I promised I would release it for wikia newbies, so here it is!
**EDIT: I ACCIDENTALLY SAID CLIPART INSTEAD OF THUMBNAIL. SORRY! PLEASE REPLACE THAT!**
(Be sure to read the little words on the bottom of the images too!)
See that "Images" button?
Step 2Now click that button to
add an image from your computer/gallery!
Step 3Click "Choose File". Choose an image to upload (e.g.: thumbnail screenshot). Press "upload photo".
Step 4I now added my image!
Step 6Now copy the file's name.
Step 7Now you can paste the image file name into "image 1"!
Hope that it worked! And if it did, cheer! If not, come to me for help!
Q: Does gifs work?
A: For whatever reason necessary, yes. But if you're trying to just cause up trouble, then a magical fairy named Admin/Moderator-san shall come and eat it along with your account! :O
More Questions will be added if there are down in the comments!