Selecting Whole Image
You can set the selected area of the image to the entire image. You can also cancel selection.
To select whole image:
|Viewer menu:||Edit/Select All|
|Viewer shortcut key:||Ctrl+A|
To cancel selection:
|Viewer menu:||Edit/Deselect All|
|Viewer shortcut key:||Ctrl+D|
The Select mode in Using Mouse in Viewer.