if you change the map width/height to limit the map dimensions, it doesn't change the comfiguration from "Default" to "Default [Modified]". This is contrary to the dimensions being a part of the mapstring and the dimension textboxes getting cleared when resetting to "Default" from "Default [Modified]".
![Image](https://forums.factorio.com/images/ext/0785193ba770613dc69ad3d17452d390.png)
Greetings,
peet1993