Cannot add Mask

[kmfdm]

I put in a PNG and a JPG into the Campaign > Image folder like I usually do but I cannot add a Mask.
Tried on other maps and mask wont work.
But any map/image from the paid modules can get a Mask.

Am I missing something?

[kmfdm]

Oh nevermind, I just remembered I added the Enhanced Image Extension and found out I have to choose the bottom level.
I feel stupid now, especially now that I cant delete this post.