A lot of people ask me about this so I thought I would write something explaining the process. Assuming you are on the Add/Edit Post page:

Click the 'Insert Image' button below the space where you type your post.

The Gallery Viewer window will pop up (not an ad so if you don't see the pop up, you need to enable them in your browser) showing you the Forum Media Gallery. Other people put pictures here, too, so don't be surprised if you see a bunch of pix. First you add your photo to the Media Gallery with the 'Add File' button. Enter a title, and description (optional), pick an appropriate category (optional), Click the browse button next to Source File and find the image on your computer. Then click the 'Add' button next to Added Files. You can repeat this process if you have multiple files. When you are finished adding files, click the 'Upload' button at the bottom of the Added Files section. IMPORTANT - if you don't click 'Upload' nothing will happen and you won't be able to find your pictures. After your upload completes, click the 'Close' link at the bottom of the image uploader pop up window.

Now, you should have the Gallery Viewer window open. The pictures are listed alphabetically by filename, so look through the list to find the picture you want to add to your forum post. When you find it, click it and you'll be able to see your photo.

The photo is just a thumbnail, so if you want the bigger version, you have to switch to HTML mode (there is a Tab at the bottom of the text entry window) and remove "_thumbs/" from the value automatically entered there.

To test all this, I typed it as I uploaded an image to this post. Its a photo of t$ from our trip to the Peace River back in 2006.