by Axel on Mon May 02, 2011 2:54 pm
There is no undo at this time, but this feature was suggested before and is already on the to-do list. This function is partially implemented in the current version and the "modifier key" was meant to be Shift.
The inner workings of such an undo function are not straightforward as the copy operation themselves run in the background and copying an image sometimes involves multiple files (JPG, RAW, WAV, XMP), so it's easy to see cases where the undo might come before the actual copy happened (or in the middle of it) and then you might change your mind again and re-copy it before the undo happened. This creates small difficulties...