Thread:NoFourthWall/@comment-11170851-20140112223631/@comment-28071061-20140112225432

You can minimize pictures by putting in File:whatever file you have|thumb|sizex|description if you want one. For example, you can turn make File:mr mite|thumb|300x|description smaller by changing it to File:mr mite|thumb|250x|description.

I'm not sure about disabling them though, outside of just removing the image from the page entirely.