Some games I've edited have screenshots as their default image, and I wanted to replace them with a proper a boxart picture. Thus, I've been wondering for quite a while on how to change the main image on any given page.
I do have way more than 5000 wiki points (which I know, is a requirement), but still I can't seem to be able to figure out how to do it. The solution is probably right in front of my nose, but so far I've been "blind" to it. 

If any of you guys could let me know how to do this, that would be great. Thanks in advance!
 

Edit: I've been shown the way, hehe. Case closed. Thanks to all the viewers, nonetheless!