K... post up into photo gallery.
Go to picture in photo gallery and select the picture to view.
Scroll down to the bottom where you'll see the tags for
Linked Thumbnail
Link Medium
Medium Image
Direct Link
Select one of them and right click and copy.
I select the medium image. Include the two tags at the ends.
Come back to your message here.
Paste the link including the img /img tags.
Save your messsage and the picture will show up.