Hey Greg. First step is to go to settings, accessories, then toggle to require alt text. This won't let you forget/post a pic without using it. Then follow these steps.
https://bsky.app/profile/grinchkicker.bsky.social/post/3lb6lk6lxf22o
https://bsky.app/profile/grinchkicker.bsky.social/post/3lb6lk6lxf22o
Reposted from
Sherri
Okay, I just did it to this one to show you. Notice in the first image it says alt. Click that. In the second image I show the box. Fill it in, click save.
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You subscribe to that account. Then you'll see a bunch of options that you can choose to show, hide, or warn. Put where your preferences lie. Or if you want to see it all, just ignore and carry on.