Easy Map Painting
This mod lets you instantly take a title, as well as any de jure titles under it, into your direct demesne by right clicking the title’s CoA and using the newly added "Paint It!" option. If the title does not yet exist, it will be created, and if it belongs to someone else it can be usurped. You can even use it on titles held by your vassals.
I’m not sure if something like this has been done before but I certainly couldn’t find anything, so I whipped this up myself for personal use. Consider it a modding tool, or just a cheat.
