I have put my photos in the trash and I don’t know how to undo what I did, it would probably help if I knew how I managed to do this?
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There are a few things we might be able to do. If you deleted your pictures, there’s a chance they may just be in the trash folder and will reside there for approximately 30 days before being completely lost. Look on the side of Photos for a folder called “Recently Deleted”. If you don’t see them there then perhaps you’ve been using a time machine backup hard drive. If so, we should also be able to get them back from the external drive. It backs up automatically as long as the user has been plugging it in from time to time.