Canon MG2500 series Online Manual page 120

Note
When multiple images are previewed, different outlines indicate different selection
status.
Focus Frame (thick blue outline): The displayed settings will be applied.
Selected Frame (thin blue outline): The settings will be applied to the Focus
Frame and Selected Frames simultaneously. You can select multiple images by
clicking them while pressing the Ctrl key.
Unselected (no outline): The settings will not be applied.
Double-click a frame to zoom in on the image. Click
bottom of the screen to display the previous or next frame. Double-click the frame
again to return the display to its non-magnified state.
When (Whole Image) is displayed on the Toolbar
Items on the Platen are scanned and displayed as a single image. All portions in the
cropping frames will be scanned.
Note
You can specify the cropping frame on the displayed image. In thumbnail view, you can
only create one cropping frame per image. In whole image view, you can create multiple
cropping frames.
Adjusting Cropping Frames (ScanGear)
Related Topic
Scanning in Basic Mode
120
(Frame Advance) at the