adequately filling field Alt Text in post submission/edit forms
setting the field URL to a source or archival snapshot that is accessible
providing an accessible description in the field Title or Body
beginning the field Body with a link (so it’s directly adjacent to image) to an accessible equivalent or description
or any other possibility as long as it achieves accessibility.
In general, it depends on the situation.
Screenshot of social media text content: link to the source or its archival snapshot.
Image of pure text: don’t post that, post text instead.
Post needs accessibility.
Images of text break much that text alternatives do not. Losses due to image of text lacking alternative:
Contrary to age & humble appearance, text is an advanced technology that provides all these capabilities absent from images.
This comic sure rustled an awful lot of jimmies.

Why do you keep responding with “needs accessibility”? What, precisely, is the remedy you’re requesting on these comics? Transcripts?
There are a number of possible remedies, so I don’t specify. All that matters is the result: web accessibility. Doesn’t matter how text alternative is provided whether by
or any other possibility as long as it achieves accessibility.
In general, it depends on the situation. Screenshot of social media text content: link to the source or its archival snapshot. Image of pure text: don’t post that, post text instead.
Thanks for the detail.
Probably that, I know on Mastodon people add a caption to pretty much every picture for screen readers, searching, etc.
It’s pretty convenient IME and doesn’t take much time. If that’s what they’re asking it’s a decent idea but they need to be clear.
Agreed.