Resizes the Image Window to the size of the current frame.
To resize the Image Window,
The R command resizes the Image Window to show the entire displayed frame. This command is most useful if you manually changed the size of the Image Window, switched to a different-sized frame, or used the Z command to zoom in on the frame.
If you specified the -autoResize flag at startup or in your .mcidasrc file, the Image Window is automatically resized to show the entire frame when you switch to a different-sized frame or zoom frames.