I know there are instructions here to do that. I saw the topic but couldn't figure out how to read it. Sorry for making you repeat the information. I am not very good at finding my way around in here.
If you could give me step by step how to post a screen shot or my own photo I would be grateful. I did it once a couple of days ago after Al and Anita gavd me instructions. I even went back in the archives to find their instructions. Still couldn't do it. 
I have GoogleDocs and can upload photos to there. Then I R click and can get the URL.
I tried several times to get a saved screen shot into chat tonight, while no one was looking, LOL. Good thing. None worked. Although the URL showed up and did take me back to my photo in GoogleDocs.
Facebook is so much easier.
HI Tweety, After you get the URL copied come back here and be sure you paste right in the middle of [img][img]. Paste where I put the smile.
[img] [img}
Now go to the bottom of the page and click on submit.
If this doesn't work for you let me know. Welcome to the BYGC.
<span style="font-size:150]Thanks, Granny, that's a good explanation. ">