Add (font awesome) icon (prepend or append) to the image attachment name into the attachments panel (jpg, gif, png, webp) that onclick open a modal popup where it is possible to rotate the image and save it. Preserve images transparencies. Immediately display the rotated image into the post, and not the browser’s cached one.
Works into any phpBB template, phpBB version 3> and Php 7.4 or >
Download here:
Rotate phpBB attachments images – phpBB extension
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