Board Thread:Support Requests - Designing Your Wiki/@comment-29002231-20181128071553/@comment-9605025-20181128203318

To clear up some potential confusion, file size is not the same as image size. Image size refers to the number of pixels in the displayed image (ex. 2000x2000 pixels) while the file size refers to the amount of storage space required for the image (ex. 10 MB). If you want to keep the same image size but need to decrease the file size (as is typically the case for ThemeDesigner), you should compress the image. Most common formats offer compression and programs such as Gimp typically let you set the compression level when you save the image. The more your compress an image, the smaller the file size for a given image size. However, if you use lossy compression (like a JPEG), more compression will also result in a "blurrier" picture.