I was posting with Gabe's mom yesterday about this. It seems to be a problem for many. Before I figured out how to do it, I too was in the dark.
Can you use PAINT? Do you have a Windows XP operating system? If so, I have cut-and-pasted my response to Gabe's mom. Hope it helps, and it's not as hard as it looks (LOL).
There is a a limit to the FILE SIZE of an attachment. Sometimes folks may try to download a file from their computer which is a HIGH-RESOLUTION .jpeg file, and it will not upload because of its size. Most .jpeg files have to be reduced in size.
I usually COPY the high-resolution .jpeg file and PASTE it to my DESKTOP as opposed to changing my original .jpeg file.
The easiest way I know how to REDUCE a high-resolution file is as follows. If you have Windows XP operating system, click the START button and then click the PAINT program.
Within the PAINT program, click the FILE tab. Click OPEN in the dropdown window. Locate the copy of your high-resolution .jpeg file on the DESKTOP. Then click OPEN. The high-resolution .jpeg file will be displayed within the PAINT program.
Click on the IMAGE button located at the top (fourth one over from the left). Then click STRETCH/SKEW in the dropdown window. Change the HORIZONTAL and VERTICAL measurements in equal percentages from 100 to a lower number. I like to use 25 for both.
Then SAVE the new settings by giving the .jpeg file on your desktop a different name. Now you are ready to add a picture to your post.
At the bottom of the REPLY TO THREAD window in the AzBilliards Discussion Forum, click the MANAGE ATTACHMENTS button.
Then click the BROWSE button and locate your newly named and reduced-resolution .jpeg file on your desktop.
Click UPLOAD and wait for several seconds. As it is uploading, a message will appear which says UPLOADING FILES/PLEASE WAIT. When it is finished uploading, then click the CLOSE THIS WINDOW button.
JAM