Posting photos FAQ:
These steps from poster Debra Wink have also been said to be very helpful:"
There is also a Help button in the top left corner of the File Browser box with tips and alternate ways to do things that you might find helpful."
Can we use thumbnail images hosted at a site like imagevenue.com, or is the forum limited to directly uploaded images?
I use Photobucket exclusively.
If you look at the menu bar in the TFL comment box, you'll see a little tree next to the 'HTML" tag on the far right.
Click it, complete the image URL (I copy Photobucket's direct link), choose the alignment, then click the insert button.
Practice it a few times, using the preview mode. You'll get the hang of it.
[edited to fix typo]