Duplicate
The Duplicate command creates a copy of the current image in an Image Window. This command duplicates only the top-most image of an image set. To duplicate the entire image set, use the Duplicate Image Set command. This command has no dialog or Properties.
To duplicate the image into a new window, select the target image window and click Edit > Duplicate in the main menu.
Copy and Paste Commands for Images, Duplicate Image Set, Image Window