earlier replies
Replying to @heydonworks
What do you mean with alternative text? Is there actually a way to set an “alt” attribute for a picture on Twitter?
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Yes! You may need to turn it on in settings. Some third party clients don't support it.
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Wow, I didn’t know about that. How do I get Twitter’s own web app to show it?
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It's somewhere in settings. A checkbox.
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I found the one to activate the editing option, but no way to activate its display. Anyway, apologies for abusing you as Twitter support
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What client are you using?
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None, just twitter.com
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Well that supports it. Not sure where you're going wrong.
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Probably I’m being thick, but I just see the picture, no text, when I click, hover, right-click
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You have to be posting the picture?
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Replying to @heydonworks
My misunderstanding was that I expected it to be visible for non-screenreader users, too

Jun 10, 2018 · 8:43 PM UTC