The same way you post one here. Use the bottom left square button on the “reply” dialogue box, except you’ll be doing it in a pm box.(mine look the same) It’s the button above the smiley to the far left above the box where you will be typing. Host your image somewhere and copy the address of the image, then paste the address here. Highlight the address and click that button and it’ll put the “img” on each end. That’s the way I do it. You can pick the button first and paste the image in the middle of the script string, but I find it to be harder that way.