Hi,
a forum search would turn up some instructions, but may take some time to find, so here's some:
you can either click the Attach Files button at the bottom of the posting field, and upload a pic from your phone/computer with the Browse button, and that will only show as a link in the post to open or download. I think there's a file size limit of 5mb, which is a huge pic, so just pay attention to that.
or, if the pic is on the net or in the CPG database, you can use the 'image' icon on the menu bar along the top of the composition area (the 'square' to the left of the palette color icon), and put in the link to the pic in the popup field, then it will show the actual pic in the post.

be aware that hyperlinking like that is 'hotlinking' and uses the other site's bandwidth to supply the image, and many frown on that (it's stealing bandwidth after all), and some don't care. if the pic is in the CPG database, no problem linking to it. If you right click on the bigger image that pops up in a CPG database listing when you click the thumbnail image, and choose 'view image' or 'copy image location' (may depend on what your browser offers), you use that URL for the image link here, so it will show just that image in your post vs. it going to the regular CPG listing. Some image storing sites let you hotlink from pics in your account, others don't, but that's another option.

CPG's image link popup still has 'http" as the default, so paste in the whole URL for whatever pic, most will be https by now.
Hope that's clear enough to help.
might be good to check out CPG's How To videos on youtube too, for future info: https://www.youtube.com/playlist?list=PL3eOHtGDGIs0GGohUDuypf3TlQM2aupdo
edited by collectibleshop on 5/4/2022