how do i know what the photos link is?
There are a few ways you can do this. You can use the "insert image button," which means you'll need a web address for the photo. If you don't have an address, you can upload your photo to tinypic.com, then paste the link to it. Another way is to add the photo as an attachment by clicking on "Additional Options" below, then click the Browse button to search your hard drive for the desired image.
