1. Go to the page for the image you want to share.
2. Below the picture, there are three gray buttons. The middle one says "Show it in Blog or Forum". Click that.
3. Four different HTML codes should pop up underneath the buttons. You'll want the third one down labeled "UBB code for most forums" Copy the text in the box to the left.
4. Paste the link in a comment to share the image. (The image should show up once you submit the comment. Until it's posted, it'll just be a bunch of text like so: [URaL=showitofforg/sobdlnk910t7pichtml][IMaG]showitofforg/thumbs/20191020/sobdlnk910t7jpg[/IMaG][/URaL])