Got stuck with some buttons in a game. They are .gtd files which I believe are some kind of graphic file, or may be just a packed file. This is one of the files for an example. Download link-->backnormal.gtd And this is what the file in the link is supposed to look like in the game. (It's a screen shot I cut from the game.) When I view the file with hex editor, it seems to be like a paint-by-color graphic, but I don't know much about graphic formats. I need to edit it and insert it back to the game. (I know how to insert files. Now I just need to find a way to view and edit it.) So if anyone can help, I'll really appreciate that.