Hope this makes sense. This is how I link my photo to the gallery image.
Gallery instructions: 1. After you upload to the gallery click on your image which will put your image on it's own page. 2. Click and copy the linked image info if that option is showing. 3. Go to the forum, click on reply to thread and paste the linked image info into the big box that opens. Sometimes you won't get the linked image option so you have to do the linking manually.
Manual Linking in the Gallery: 4. After uploading your image, click on the image you uploaded. 5. Copy the URL at the top of the page. I then paste this info into a word doc. 6. Then right click on the image itself. This will give you a chance to copy the URL for the image. (You will find this URL option under Properties in some browsers. You will have to copy the URL info that pops up under Properties.).
Forum directions: 7. When you reply to the forum thread click the square icon above the image area and paste your copied image URL info in the little box that opens. 8. Next, take your mouse and highlight your uploaded image. 9. Go to the icons at the top of your image and choose the globe. A box will open and you can paste the URL from your word doc in that box. That will create a hot link to the gallery from the forum.