Answer:
Command Shortcut Description
Selection>Select All a Select entire image
Selection>Select None shift+a Delete selection
Selection>Restore shift+e Restore previous selection
Selection>Add to Manager t Add selection to ROI Manager
Explanation:
How to select multiple files that are not grouped together: Click on the first file, and then press and hold the Ctrl key. While holding down the Ctrl key, click on each of the other files you want to select. You can also simply select multiple pictures by selecting them with your mouse cursor.
