1: Upload directly to the post On the post page, there is a button labeled "Upload a File". When that is clicked, choose a file to upload onto your post. From there, you can add it to your post as a thumbnail, or a full size image. 2. Upload to the Canon Forums Photo Gallery If you have photos uploaded to your gallery, you can just use those photos to put on a post. To do so, click the button to embed a photo as shown below: And then choose the photo(s) you want to add to the post by clicking on them. 3. Link to the image from an external site On the post page, there is a button that allows a linked image. First click on the icon shown below, and then enter in the URL.