Good Morning!!
At the very bottom of your original or reply screen is an "Attach File" space with a "Browse" button next to it.
Simply click Browse, and you can browse your computer for your picture. Once you have found it, click on it, and it will then appear in the formerly blank box.
Hit "submit" and it should appear, as I hope this pic of heartbreak hill fo the Santa Fe Century does.
I will know in a minute if I got it right
Later - yep, I did it ok!!