Polaroid DCM 2 Online - Manual (Page 76)

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General Preferences (Continued)
Save Viewfinder ROI settings When the DMC 2 program is closed, saves the image
capture area (region of interest) selected on the Region of Interest Selection tab in the
DMC 2 main window.
Overwrite Images During Rapid Fire When camera buffer becomes full during a
rapid fire sequence, begins overwriting the first file in the buffer instead of stopping
rapid fire.
Multi-frame Averaging/Dark Subtract Enables multi-frame averaging and dark
frame subtract for reducing grain in long exposures (longer than 500 milliseconds).
After enabling this feature, select the number of light frames and dark frames. (Higher
values increase grain reduction.)