Saving and attaching photos to an email.

There are many ways. Assuming you use Photos and Mail, the easiest way for me is to open Photos and then browse the photos, selecting the photos I want to include in the email. (Command click to select more than one photo.) When you've selected them all, right click on the last photo (still holding command) and select Share from the contextual menu. Select Mail. The email program will launch, open a blank email and place the photos in it.

You can also open an email, click on the photos icon (looks like 2 mountains in a rectangle). A little pallet will appear and you can select your pictures to add.

You could drag the photos to your desktop and then drag them to your new email. Or I think you can drag them directly from email into photos and then put them into email as I described above. As often in the evening I’m not near a Mac so I can’t test that second method. You could also drag them to desktop and then to Photos and then again as described above.

Where is the image now? What app are you using for email?