Hi, yes you can target the Message Window with it so you could show a scrolling background on your messages, though it does not allow you to change it later during gameplay. I can add that feature to a future release, or possibly to [CGMZ] Message System as I think it might fit there with my other options for those windows such as tone / windowskin changing. My plugins are not obfuscated so you could also modify it to do that yourself if you are able to write JS.