How to put memes into Facebook COMMENTS?

[ris]

I know thy have codes for Facebook CHAT. But I want to know how people are putting memes into COMMENTS. I am caps locking because I Google this and ALL I find is everything else. I know the instruction to put "!" on each end of when copying image URL, but I just get the link and a small preview of the photo. Just copying doesn't work. I'm actually on a home computer I tried every option thus far....is there a website? I just want to know lol
It says, "The content you requested cannot be displayed right now. It may be temporarily unavailable, the link you clicked on may have expired, or you may not have permission to view this page" when I take it from my own library..

[Jenni]

When you click the comment box, look to the far right of it and a little camera icon will show up. Click that and it will let you browse your computer for picture files.