Maybe my search logic is faulty, but I didn't see this question asked/answered in the forum. If it's there and I'm not finding it, I apologize.
Question: In Image Preview, is there a shortcut way to mark all images in a preview?
For example, Reviewing images, I see one with multiple duplicates, and neither the original or the duplicates are worth keeping. Is there a way to mark all with a keystroke rather than clicking "Mark" on each image?
I'm a hobbyist photographer, and as you can imagine, I keep major numbers of duplicates to avoid losing that one "masterpiece".

Perhaps I'm overlooking this feature?
Great product. HUGE time saver.