783620H / 1013 5. MENU COMMANDS
5.8. ROI
An ROI — region of interest — is a way to denote channels or groups of channels in the spectrum as having special meaning. An ROI can be used to mark peak areas for the printout or to mark a peak to stop acquisition when that peak reaches a preset value. Channels marked as ROI channels are displayed in a different color than the unmarked channels.
The ROI menu is shown in Fig. 221. Its functions are available in both buffer and Detector windows. See Section 4.4.3 for
ROI operations performed with the mouse.
5.8.1. Off
This sets the ROI status to Off. In this state, the ROI bit for the channels does not change as the cursor moves. This function is duplicated by <Alt + O> and by <F2> (which toggles between
Off, Mark, and UnMark).
The usual ROI status is Off so the marker can be moved on the display without changing any of the ROI bits.
Fig. 221. ROI Menu.
5.8.2. Mark
This sets the ROI status to the Mark (set) condition. In this state, the cursor channels are marked as the cursor is moved with <
6> or <7> into the channel. Moving the marker with the mouse does not change the ROI in this mode. This function is duplicated <Alt + M> and by <F2>
(which toggles between Off, Mark, and UnMark).
ROIs can also be marked with the rubber rectangle and right-mouse-button menu (see
Sections 4.4.3 and 5.11.8), and as described in Section 5.8.4.
5.8.3. UnMark
This sets the ROI status to the Unmark (reset) condition. In this state, the channels are unmarked as the cursor is moved with <
6> or <7> into the channel. Moving the marker with the mouse does not alter the ROI in this mode. This function is duplicated by <Alt + U> and by <F2>
(which toggles between Off, Mark, and UnMark).
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