Change. DORIC 9.65, INFO-Text software

CHANGE

CH

ANGE IF_name

PG_name

RP_name

SF_name

[

[

S

D

MART]

UMB] file_path

S

YSTEM [

P

RINT]

[

P

RINT]

CH

ANGE

changes the content of any ASCII text file or INFO source file, that is, a program, report, special form, or input form. CHANGE is synonymous with ED and is a line editor

arguments

IF_name | PG_name | RP_name | SF_name the INFO file to be changed.

[SMART | DUMB] you can tell INFO to verify or not to verify changes to the file.

SMART directs INFO to verify that inserted lines and changed text are valid for the current report, program, input form, or special form. SMART is the default mode for the CHANGE command, except when you also specify the SYSTEM option.

If you try to insert an invalid new line, INFO rejects the line and issues an error message. If you change text on an existing line so that the command is invalid, INFO aborts the change process and issues an error message.

In addition, INFO ensures that changes to a program do not violate program section boundaries, and that changes to a report do not violate column content and heading correspondence.

DUMB directs INFO not to verify any modified or inserted text during CHANGE execution. DUMB is the default mode when you use CHANGE to edit system files.

[PRINT] sends a copy of the source file to your spool file

before you make any changes to it. If you include the

PRINT option for an ASCII file, INFO assumes that all data in the file is printable; it does not perform any data conversion before printing.

INFO Reference Manual Commands 65

CHANGE

file_path the full system pathname of an ASCII file.

SYSTEM indicates that the specified file is an ASCII text file.

notes discussion

n

Before you use the INSERT or REPLACE requests on a source file, be sure to take the following steps:

1) Format any of the system variables, $CHR#, $DAT#, and

$NUM#, that are referenced in the source file (see the

FORMAT command for instructions to do this).

2) Relate all data files to be used when the source file is executed, in the order in which they were related when the source file was defined.

n

Note that if you save the move or copy range of a program file to an INFO file, INFO creates a directory entry for the saved file and generates a PROGRAM SECTION ONE statement at the beginning of the saved file. If the first saved statement is an even-numbered program statement,

INFO generates a PROGRAM SECTION TWO statement immediately following the PROGRAM SECTION ONE statement. If you save to an ASCII file, INFO does not perform any validity checking on the saved file.

n

Be careful if you change an ASCII text file that contains

INFO program or report text that you want INFO to use subsequently. If you use the CHANGE command to edit the file, INFO does not perform any validity checking on lines in the file. You must ensure that the format and syntax of the program/report lines are correct.

In the following discussion, the term source file means an

INFO program, report, special form, or input form. Unless otherwise specified, all CHANGE options apply to each of the four INFO source files.

When you enter a CHANGE command, INFO starts a dialog with the prompt ENTER OPTIONS>. You can then make changes to the file using one of the CHANGE options. See 'Table CHANGE-1, Change options'.

66 Commands INFO Reference Manual

CHANGE

Many of the CHANGE options reference the current line of the source file. When INFO first begins the CHANGE dialog, it considers the current line to be the top of the file, just before the first line, and displays BEGINNING OF

FILE. Subsequent options cause INFO to point to other lines as current. REPLACE, CHANGE, COPY, DELETE and MOVE first affect the current line. The options that involve putting lines between existing lines, like INSERT,

LOAD and the second phase of COPY or MOVE, insert immediately after the current line.

To stop the CHANGE processing, use the Q (quit) option to save all the changes you requested and return you to

ENTER COMMAND >. You can also use the K (kill) option to stop editing without saving any of the changes.

SPECIAL CONSIDERATIONS when changing

INFO source files when replacing or inserting lines

When changing any INFO source file, use any of the options described in Change-1 to change the contents of the source file. You can request that the CHANGE session operate in SMART or DUMB mode.

When you issue an unqualified REPLACE for any source file, or you request an unqualified INSERT for a program, input form, or special form, INFO prompts with ENTER

TEXT:

When you issue an unqualified INSERT for a report, INFO issues a prompt appropriate to the current line for the file:

ENTER COLUMN CONTENT>, if the current line is a heading line, or ENTER COLUMN HEADING>, if the current line is a report item definition.

In any of the above cases, enter your changes or a

<RETURN> to abort the request and return to the ENTER

OPTIONS> prompt.

INFO Reference Manual Commands 67

CHANGE when revising programs when revising reports

When you change a program, INFO automatically renumbers the lines in the program on leaving the

CHANGE editor. These numbers do not affect program execution. They are strictly for reference. After inserting lines in a program and when the mode setting is SMART,

INFO ensures that the odd/even program section sequence is still correct. If necessary, INFO inserts a

PROGRAM SECTION statement to maintain the odd/even program section sequence.

If you want to insert lines before the first existing program line, specify TOP, then INSERT. INFO generates a

PROGRAM SECTION ONE statement before the inserted lines and deletes the original PROGRAM SECTION ONE statement.

If you repeatedly try to point beyond the last line, INFO might alter the number of the last line. However, this cannot affect how the program works, and INFO renumbers the program the next time you issue a

CHANGE command.

INFO saves each column definition on two lines in the report file. The first line includes spacing instructions, column content, and any specified options. The second line includes all the elements of the column heading.

INFO preserves this separation when you use the

CHANGE editor.

When you enter a new report line using the INSERT or

REPLACE option, INFO takes you through a dialog parallel to column definition. The prompts you receive depend on your location in the report. Remember that

INSERT starts inserting after the current line.

If the current line is a column heading, or a column definition that appears in the second or subsequent line of the report, INFO first prompts with ENTER COLUMN

CONTENT>. Respond by entering an item name, text string, arithmetic expression, space saver, tab indicator, or equal sign (=), as described in the REPORT command.

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CHANGE

Because only the first line of a multi-line report can have column heading information defined for each report item,

INFO ensures that any changes you make do not affect this sequence, as follows:

1) If you replace an existing column definition line with an equal sign to begin a new report line, INFO deletes all column-heading lines that follow the replaced line.

2) If you replace the first existing equal sign with a report item definition to lengthen the first line of the report, INFO inserts blank column-heading lines for each column definition line that follows the replacement line until it encounters a line break (an equal sign).

To avoid getting the next ENTER REPORT OPTIONS> prompt, place a comma at the end of your column content response.

If you do not terminate the previous entry with a comma,

INFO prompts with ENTER REPORT OPTIONS>. Follow the REPORT command instructions for entering options.

If the current line is on the first line of the report, you get the ENTER COLUMN HEADINGS> prompt.

If the current line is a column definition on the first line of the report, INFO first prompts ENTER COLUMN

HEADINGS>. Enter a new heading for the column, following the rules or the REPORT command.

You can enter <RETURN> to request that INFO not change the headings. If you do this, INFO tries to fit the headings to the column width if that has been changed. If the headings are wider than the new column width, INFO truncates the right-hand characters from the headings.

If your report width changes, INFO recentres the title to fit the report. If you want to change the title, position the cursor to the title line and use the CHANGE or REPLACE options to make the desired changes. You cannot change the number of lines in a report title by deleting or inserting lines, or by inserting an equal sign specification within the existing title.

INFO Reference Manual Commands 69

CHANGE when moving or copying lines

When you request a MOVE or COPY option during a

CHANGE command, you must first indicate the range of lines to be moved or copied Use the positioning options to locate the first line you want to move or copy. Then follow either of these two procedures to indicate the last line to be moved or copied:

1) Issue the MOVE or COPY option and specify the number of lines or a search string to delineate the end of the range. INFO marks the current line as the starting line of the move/copy range and locates the ending line using the specified number or search string.

or

2) Issue an unqualified MOVE or COPY option. INFO marks the current line as the starting line and prompts you to indicate the ending line, as follows: MOVE WHAT> for a move request, or COPY WHAT> for a copy request. Use the positioning options to locate the last line to be moved or copied, and then enter another unqualified MOVE or

COPY option. INFO marks the located line as the ending line. If you try to mark a line that precedes the starting line as an ending line, INFO issues an error message and returns you to the ENTER OPTIONS> prompt. You cannot move or copy title lines in a report; if you try to do so, INFO issues an error message and aborts the request.

After you indicate the range of lines, INFO prompts MOVE

TO WHERE> for a move request, or COPY TO WHERE> for a copy request. Again use the positioning options to locate the target line for the move or copy operation. The target line can be anywhere in the file, except within the range of lines to be moved or copied. When you locate the target line, enter another unqualified MOVE or COPY, and INFO completes the operation.

In response to the prompt for the target location, or at any time after INFO issues the prompt but before you mark the target line, you can enter the SAVE option to save the range of lines marked for the MOVE or COPY option. Use the SAVE option as described in Table CHANGE-1, except that you must specify an INFO or an ASCII text file name; you cannot enter an unqualified SAVE command in this instance.

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CHANGE

If you save the move/copy range of a report to an INFO file, INFO creates a directory entry for the saved file that has the same attributes and contains the same report definition information as the report file from which you issue the SAVE option. If you send the saved information to an ASCII text file, INFO cannot create a directory entry for the file that contains the report attributes. See

'Considerations when using ASCII text files' in this command reference for information about using reports from system text files.

After moving or copying program lines, INFO determines whether or not to generate or delete PROGRAM SECTION statements to preserve the odd/even program section sequence as follows:

1) Following a move, INFO checks the statements at the beginning and end of the moved text at the target location, and the statements remaining at the source location. If necessary, INFO generates or deletes a PROGRAM

SECTION statement at these locations.

2) Following a copy, INFO checks the statements at the beginning and end of the copied text. If necessary, INFO generates or deletes a PROGRAM SECTION statement at the two locations.

1) Following a move or copy operation within a program file, the program line numbers may be out of sequence. INFO renumbers the program when you end the CHANGE session. Alternatively, you can issue the SAVE option;

INFO renumbers the program lines when it processes the

SAVE.

After moving or copying report lines, INFO checks to ensure that report item definitions and column headings are sequenced properly. If necessary, INFO generates or deletes column heading lines, as follows:

1) If INFO finds a report item definition line without a column heading in the first line of the report, INFO adds a blank column heading line for that report item line.

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CHANGE

2) If INFO finds a report item definition line with a matching column heading line following a line break, INFO deletes the column- heading line.

3) If INFO finds a column heading line without a matching report, item definition line, INFO deletes the column heading.

When INFO generates or deletes lines, it issues an error message warning you to examine the file to see if further editing is necessary.

You can terminate the move/copy request at any time with the KILL option.

when loading from a file

When processing the LOAD option in DUMB mode, INFO does not verify the lines loaded. When loading a file in

SMART mode, INFO verifies each line of the file. If

INFO finds an invalid line, it aborts the load request and issues an error message, leaving the file you wanted to change in the condition it was before you issued the LOAD option.

When loading a program, INFO examines the first and last of the loaded lines to ensure correctness of the odd/even section sequence. If necessary, INFO generates or deletes a PROGRAM SECTION statement at the two locations.

When loading a report, INFO loads only report itemdefinition and column heading lines; it ignores title lines.

INFO checks that report item definitions and column headings are in proper order, as described under

'Considerations when revising reports'. If necessary, INFO generates or deletes column heading lines, as follows:

1) If the target location for the load is in the first line of the report, that is, before an equal sign (=), INFO adds a blank column heading line for any loaded report item definition line that does not have a column heading line.

2) If the target location for the load is in the second or subsequent line of the report, that is, after an equal sign

(=), INFO does not load any column heading lines into the file you are changing.

72 Commands INFO Reference Manual

CHANGE when using

ASCII text files

When using the CHANGE command with an ASCII text file, INFO operates in the DUMB mode. You cannot specify the SMART mode in this situation. Use any of the options in Table CHANGE-1 to change lines in the text file. Text file names cannot be longer than 32 characters.

If you want INFO to use a program or report that exists in a text file, you must take the following steps to load the text file into an existing INFO file:

1) Create an INFO source file of the same type (such as program or report) as the ASCII text file. The source file can contain commands. Use the PROGRAM command to create a program file or the REPORT command to create a report file, following the instructions for those commands. If you use an INFO report file that contains an existing report definition, it must reference the same data file items as the report to be loaded from the text file.

2) Enter the CHANGE command and the INFO program or report file.

3) Use the LOAD option to load the text file into the

CHANGE file.

4) Perform any necessary edits.

5) Use the QUIT option to exit the CHANGE session.

You can now request that INFO execute the program or report.

INFO Reference Manual Commands 73

CHANGE example

In the example below, the program called PB.RUN.REP, which now produces the report RP.STATUS, is changed to produce the report RP.YTD.SALES.

ENTER COMMAND CHANGE PB.RUN.REP

ENTER OPTIONS>P 25

BEGINNING OF FILE

10000 PROGRAM SECTION ONE

10001 SELECT DF.SALES RO

Display 25 lines.

.

.

.

10010 REPORT RP.STATUS Y 60

10011 DISPLAY =

10012 DISPLAY AT 10,20 ‘READY TO SPOOL’

10013 ELSE

10014 IF $CHR1 = 'N'

10015 REPORT RP.STATUS N/W 23

10016 ELSE

10017 GOTO RETRY

10018 ENDIF

10019 ENDIF

END OF FILE

ENTER OPTIONS>T

BEGINNING OF FILE

ENTER OPTIONS>F 10010

Position to top of file

Find line 10010

10010 REPORT RP.STATUS Y 60

ENTER OPTIONS>C /STATUS/YTD.SALES/6

10010 REPORT RP.YTD.SALES Y 60

Search the next 6

lines

for the

10015 REPORT RP.YTD.SALES N/W 23

value STATUS and

ENTER OPTIONS>Q

change it to

YTD.SALES

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CHANGE

Table CHANGE-1 Change options

Option syntax

A

B

PPEND [string]

OTTOM

C HANGE [options]

Unless noted otherwise, source file, as used below, refers to an INFO program, report, special form, or input form.

Description of function performed

Append text. Requests that INFO append text to the end of the current line.

If you include the string specification, INFO appends the string contents to the end of the current line. String can be any combination of characters, separated from the APPEND option by one space; if you enter two spaces following the APPEND, INFO assumes that the second space is the first character of the string.

If you do not include the string specification,

INFO prompts you to ENTER TEXT>.

Respond by entering the string contents you want appended to the current line. The length of a source file line following the append operation cannot exceed the maximum command length for your operating system.

Locate Bottom. Points to below the last line in the file and displays the END OF FILE message.

Change text. Changes the value of a text string in the current line. If the

C

request is entered alone, INFO prompts

FROM>

and waits for you to enter the string you want to change.

Once you enter the string, INFO prompts

TO> and waits for you to enter the new string. The following dialog changes $NUMS:

ENTER OPTIONS>C

FROM>$NUMS

TO>$NUM1

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CHANGE

Table CHANGE-1

Option syntax

Change options (cont'd)

Description of function performed

You can also enter all of the command specifications on a single line. When you use this option, you can also specify:

1) the number of lines INFO should search for the FROM text

2) whether to change only the first instance of the string in the searched lines or to change all instances of that string

To enter the command in this way, follow the syntax below:

C/old-text/new-text[/[line-count] [G]] where: n old-text and new-text are the string to be replaced and the replacement string, respectively.

n

Line-count is an integer that tells INFO how many lines to search for the old-text. If a linecount is not entered, the other specifications apply only to the current line.

n requests that INFO globally change all old-text strings in the file. If

G

is not entered, INFO only changes the first occurrence of the old-text in each line.

To separate the old and new text, instead of the slash (/), you can use any character (except a blank space) that does not appear within either string.

76 Commands INFO Reference Manual

Table CHANGE-1

Option syntax

CO PY [# | string]

DE LETE[#]

F IND # the

(programs only)

CHANGE

Change options (cont'd)

Description of function performed

Copy line(s). Requests that INFO copy the number of lines indicated to another location in the file, leaving the source lines intact in their current location. If you specify #, where # is a positive integer, INFO copies the number of lines indicated, beginning with the current line.

If you specify string, where string is any combination of characters separated from the

COPY request by one space, INFO copies text from the current line to the first line containing the string value. If INFO cannot locate a line containing the specified string, it issues an error message and aborts the COPY request.

If you do not include the # or string specification, INFO prompts you to mark the lines to be copied, as discussed in

'Considerations when moving or copying lines'.

Delete line(s). Deletes the current line in the file or, if the # specification is provided, where

# is a positive integer, deletes # lines from the file, starting with the current line. Moves to the next available line and displays that line at the terminal. If the value of # exceeds the number of lines left in the file, INFO deletes all remaining lines and displays the message END

OF FILE. The # specifier must be a positive integer.

Find program line. Locates the line that has line specified by #, where # is within 100000 of the current line. Moves to the new line and displays that line at the terminal. To find a line more than 100000 lines away, use repeated F requests.

INFO Reference Manual Commands 77

CHANGE

Table CHANGE-1

Option syntax

I NSERT[string]

K ILL

Change options (cont'd)

Description of function performed

Insert line(s). Requests that INFO insert one or more lines following the current line. If you include the string specification, INFO inserts the specified line of text following the current line and moves to the newly inserted line.

String can be any combination of characters, separated from the INSERT request by one space. If you enter two spaces following

INSERT, INFO assumes that the second space is the first character of the string. If you do not include the string specification, INFO prompts you to ENTER TEXT:.

You can enter any number of new lines after the ENTER TEXT

:

prompt. If you are changing a program or text file, enter the lines together following the initial prompt; for the other types of files, INFO prompts separately for each line.

When you are finished, enter <RETURN>.

Make sure that the new lines are consistent with the type of source file being processed, and that they follow all rules regarding that source file. At the end of an INSERT, INFO moves to the last line entered.

Kill the CHANGE session. Ends the CHANGE session without updating the file; any changes made since you issued the CHANGE command will be lost. If you changed the file, INFO prompts: DO YOU WISH TO CONTINUE (Y

OR N)>. Respond Y (yes) to abort the session and return to the ENTER COMMAND > prompt. Any other response aborts the KILL request and returns you to the ENTER

OPTIONS> prompt.

78 Commands INFO Reference Manual

Table CHANGE-1

Option syntax

Change options (cont'd)

CHANGE

Description of function performed

L OCATE string

LO AD file-name

Locate string value. Searches forward in the file, starting with the next line, until it finds a line that contains the value of the string argument. Moves to the located line and displays that line. String is separated from the

LOCATE request by a space.

Load from specified file. Requests that INFO insert records from the specified file immediately following the current line. Records in this case refer to lines from the specified file.

If positioned at the top of the file, INFO loads the requested file before the first line of the

CHANGE file; if positioned at the bottom of the file, INFO loads the requested file after the last line of the CHANGE file. Alternatively, you can specify loading from an ASCII text file, limit the number of records loaded, or request that INFO load a specified INFO file from another INFO user area using the following syntax:

LOAD <file_name> [beg_rec_#[

, end_rec_#]] [FROM user_name] or

LOAD <file_path SYSTEM>[beg_rec_#[

, end_ rec_#]] where: n file_name is the name of the INFO file you want loaded into the CHANGE file. Note that the file must exist in your INFO user area and must be the same file type as the CHANGE file.

n file_path SYSTEM is the name of the ASCII text file from which you want to load records.

You must include the word SYSTEM to indicate that the file is a system file rather than an INFO file.

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CHANGE

Table CHANGE-1

Option syntax

Change options (cont'd)

Description of function performed n beg_rec_# and end_rec_# are optional specifications that identify the numbers of the first and last records to be loaded from the file.

If you include a beg_rec_# without an end_rec_#, INFO loads records from the starting record to the end of the file. If you do not include beginning or ending record numbers, INFO loads the entire contents of the specified file.

MOD E[SMART | DUMB]

MO VE[# | string] n

FROM user_name is an optional specification that applies only to INFO files and directs INFO to search the specified INFO user area for the file.

See 'Considerations when loading a file' for more information about the LOAD request.

Switch mode setting. Requests that INFO change or display the mode in which the

CHANGE command is operating. If you include a SMART or DUMB request, INFO establishes that mode immediately. If you issue an unqualified MODE request, INFO displays the current mode setting.

Move line(s). Requests that INFO move the number of lines indicated to another location in the file and delete the source lines from their original location following the move. If you specify #, where # is a positive integer, INFO moves the number of lines indicated, beginning with the current line. If you specify string, where string is any combination of characters separated from the word MOVE by one space,

INFO moves the lines beginning with the current line and ending with the first line containing the string value. If INFO cannot locate a line containing the specified string, it

80 Commands INFO Reference Manual

Table CHANGE-1

Option syntax

N EXT [#]

P RINT [#]

PO INT #

INFO Reference Manual

CHANGE

Change options (cont'd)

Description of function performed issues an error message and aborts the MOVE request. If you do not include the n or string specification, INFO prompts you to mark the lines to be moved, as discussed in

'Considerations when moving or copying lines'.

Point to Next line. Points to the next line, or, if the # specification is provided as a positive or negative integer, to the line that is +# or -# lines from the current line. Displays the new line at the terminal. The value of # defaults to

1.

If a NEXT -# request would point above the top of the file, INFO moves to the line before the first line and displays the message

BEGINNING OF FILE.

If a NEXT # request would point below the last line of the file, INFO moves to the last line and displays the message END OF FILE.

Print line(s). Displays the number of lines specified by # at your terminal, beginning with the current line. Specify # as a positive integer. If you do not include the # specification, INFO displays the current line.

After printing, the last line printed is the current line. If the number of lines specified by # is greater than the number of lines in the file,

INFO moves to the last line in the file and displays the message END OF FILE.

Point to specified line. Points to the line specified by # where # is a positive integer

(including 0). INFO moves to the requested line and displays that line. If you specify # as

0, INFO moves in front of the first line and displays the message BEGINNING OF FILE.

Commands 81

CHANGE

Table CHANGE-1

Option syntax

Q UIT

R EPLACE [string]

S AVE

Change options (cont'd)

Description of function performed

If you specify # as greater than the number of lines in the file, INFO moves beyond the last line in the file and displays the message END

OF FILE.

Quit the change dialog. Saves all of your changes, exits from the CHANGE processing and returns you to ENTER COMMAND >.

Replace line. Requests that INFO replace the current line. If you include the string specification, INFO replaces the current line with the string contents.

string can be any combination of characters, separated from the keyword REPLACE by one space. If you enter two spaces following the

REPLACE request, INFO assumes the second space to be the first character of the string. If you do not include the string specification,

INFO issues a prompt for a new line that replaces the current line.

In this case, enter the new line. Unlike the

INSERT request, you can enter only one line here. If you are changing a form, make sure that the new line is consistent with the type of form being processed and that it follows all rules regarding that form. To abort the replace request, enter a <RETURN>. At the end of a

REPLACE, INFO points to the new line.

Save file. Directs INFO to save the current contents of the CHANGE file, except as discussed below for a MOVE/COPY request, using the following syntax:

SAVE [file_name | file_path SYSTEM]

82 Commands INFO Reference Manual

Table CHANGE-1

Option syntax

CHANGE

Change options (cont'd)

Description of function performed where file_name is the name of an INFO or

ASCII text file. If you do not include the file_name specification, INFO saves the current CHANGE file contents into the original file. If file name or file path is a text file, you must include SYSTEM; otherwise, INFO assumes the requested file is an INFO file. If the requested file name does not exist, INFO creates and opens a new file by that name. If the requested file name exists but is not the same type of file, INFO displays an error message and aborts the SAVE request. If the requested file name does exist and is the same type of file, INFO prompts you:

OK TO OVERWRITE OLD COPY>.

Respond Y (yes) to request that INFO overwrite the specified file with the current CHANGE file contents; otherwise, enter N (no) or

<RETURN> to abort the SAVE request.

Following successful completion of the SAVE operation, INFO ends the CHANGE session and returns to the ENTER COMMAND > prompt. If the CHANGE file is a program,

INFO renumbers the program lines.

During a MOVE or COPY request, after you have marked a range of lines to be moved or copied, but before marking the target location, you can enter a SAVE request to save the range of lines marked for the MOVE/COPY request. Use the SAVE option as described above, except you must specify an INFO or text file name; you cannot enter an unqualified

SAVE request in this instance.

INFO Reference Manual Commands 83

X

CHANGE

Table CHANGE-1

Option syntax

T OP

<RETURN>

see also

Change options (cont'd)

Description of function performed

Locate Top. Points to the line before the first line in the file. INFO displays the message

BEGINNING OF FILE.

Re-executes the previous CHANGE command.

e.g.

P 23 display 23 lines

X display next 23 lines

N -5 re-position 5 lines back

X re-position a further 5 lines back

Point to next line or return to the ENTER

OPTIONS> prompt. When entered in response to the ENTER OPTIONS> prompt, directs

INFO to point to the next line in the file. During

CHANGE option processing, such as an

INSERT or SAVE request, exits the current option and returns to the ENTER OPTIONS> prompt.

EDIT

84 Commands INFO Reference Manual