I know this has been around awhile. Tiny started a thread back in 2015 and it became a "sticky."

These are
step-by-step instructions in PDF download (with screen shots ... my favorite) for uploading an image in the forums. It is a one-page PDF -- well worth printing and keeping.
Tiny's post said: "
It is now possible to post images in the technical forums and the Swap Meet area. Images can be no larger than 300KB and no more than five per post. Click the link below for the How To. If you have questions about how to resize images post it in the 'Bus."That limitation has changed. The only place you can't post pix is in Spoon and Private Messages.
Also, important to know (it was for me): the picture comes from your computer or device. Doesn't have to be "up there somewhere" like the links are.

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Edited by PM, May 10, 2023: Khansen added this information for us. Very helpful:So here's a screen capture video I put together for posting photos with captions. Just follow the pointer. POSTING A PICTURE WITH A CAPTION