How to delete images from Photos

Readers ask about how to clear out space used by multimedia in the Photos app through deletion and optimization.
    Related:
  • Photography
  • MacOS
  • Apple Photos
  • Troubleshooting
Glenn Fleishman’s most recent books include Take Control of iOS & iPadOS Privacy and Security, Second Edition (covering iOS 15/iPadOS 15), Take Control of Your M-Series Mac, and Take Control of Securing Your Mac. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.