Thanks to
Mischief5 for pointing me in the right direction.
Scrapbook had a feature that allowed you to post a teaser picture and let you click on it to enlarge it to full size. LJ of course screwed that up, but there is a fix!
danceswithgary created a code that allows you to post a preview that can be enlarged.
Just click here for the instructions. Yay for fandom!