Shrink dim box?

[jakr8911]

Im using yanfly message core, i change the box width to 1000 for my game, but the dim box is also change, can I just change the window box and not the dim one?

 

[MushroomCake28]

The dim box and regular box (and transparent box) are all coded in the same window. Changing one of them means changing all of them. Your only way to do it is to modify the code, or find a plugin that already does that.