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Can’t figure out how to thumbnail?
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this post was submitted on 11 Mar 2025
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Hey there! I just tested it myself and there might be some confusion here on how this works so I can explain a bit further. Feel free to let me know if you still have any other questions.
The thumbnail URL only works when you're creating a link post (e.g., when the URL field is filled in). This is used when you want to show a different thumbnail image than the one that Lemmy fetches from the original link. If you try to fill in the thumbnail URL for a image or text post, it won't end up doing anything (this might be where the confusion comes in).
If you want to create a post with an image, you can simply upload the image (the button beside the URL field) and Lemmy will automatically generate the thumbnail based on the image you uploaded. Hope this helps!
lol, so ironically the posts I’ve made so far would have had a thumbnail if I hadn’t tried to specifically give them a thumbnail through the link field? The posts have images in their body of the text too.
I believe so! Lemmy will try to generate a thumbnail from the link field whenever possible. You can try this by creating a post with a link and see what shows up after you make that post.
If you don't see a thumbnail after creating the post, then it's likely that Lemmy wasn't able to automatically fetch the thumbnail for it. If this happens, you can specify a custom thumbnail for Lemmy to use using the Thumbnail URL field (as long as this points to a proper image)
You can have images within the body of the text, but Lemmy won't use those images for the thumbnail (if I recall correctly) - it'll only look at the URL field to determine what thumbnail to use.