Just few tips for the attachments .
1) You had to click once on the picture , then you should wait few seconds so the picture to load ...
If its an large one , it could take even 10 seconds or more , double clicking does not help,
so to speed up the process.
2) If the picture loads up , and its larger than your screen resolution ,you can use the arrows on your keyboard, so to scroll left right or up down .
I am saying all this , because every forum software , has its own behavior and settings.
Lets hope that I have help someone, with those tips ..