I am not sure if the following hint is mentioned somewhere in the manual but I couldn’t find it anywhere.
Before I explain the reason, here’s the simple solution.
The solution
Drag the image (it can be a version) from the browser or the viewer to the target project in the Library Inspector with the alt/option key pressed. This key press is the secret! A green plus sign near the cursor gives you the certainty that the image will not be moved but copied to the new location.
Why should I wish to have the same original in two projects?
In my case: After scanning every page of a very old photo album at high resolution (an album page with multiple photos on it, that is), I wanted to “cut out”, aka crop, every single photo to finally get a collection of separate images from that album. But I also wanted to keep the original collection of pages together at another place, to be able to browse through the pages.
That was the reason to copy the scans to a second project before starting to cut the pages.
Cutting out the images
For the cutting procedure I followed these steps (with the keyboard shortcuts in brackets):
Select the image of the album page in the viewer:
- Choose crop [C]
- “Cut out” (crop to a single photo) and straighten [G] the first photo
- Copy the version [Option V]
- While still in the cropping mode, cut next photo
- Copy the version [Option V]
- Cut out the next photo, etc.
- End with the [Retun] key
While viewing each of the images, you can toggle the original page where it came from as well by hitting the [M] key (master image). Nice!