Image galleries display those images that were uploaded to that post, by default. If I wanted to move an image to a different post, so it appeared there instead, would I have to delete and re-upload? Or, is there a way to re-assign an image that's already in the Media Library?
I've saved this as a snippet in my IDE for use in projects. Very handy!
If the image is in a Gallery you would need to delete it, or exclude it inside the short-code for the gallery.
If it's a single image you could just delete it from that page (not from the media manager). It could be used inside a different page by uploading it.
I'm not aware of a simple way to remove single images from galleries (without excluding it with short-code). I tried the link that posted by:Brian Fegter. It did add a re-attach button but I don't see how that is relevant to this specific question.