On the web interface, click/tap the 3 dots below your post, click edit, remove the link to the image, reupload the new image by tapping the image icon in the post toolbar, select image, upload, voila!

As on how to edit the image, well use some image editor app on your phone? My Galaxy S23 has a default editor. Or just download the image I edited for you.

[–] favrion@lemmy.world 0 points 1 year ago (1 children)

The image wasn't flipped when I uploaded it.

[–] 001100010010@lemmy.dbzer0.com 1 points 1 year ago (1 children)

Oh, must be some lemmy.world shenanigan, it never happens on my instance. You should contact your instance admins.

[–] favrion@lemmy.world 0 points 1 year ago (1 children)

I can try.

[–] favrion@lemmy.world 0 points 1 year ago

Actually, I can't find how to do that on the app.