'Fill tool' in map editor

[Twi]

You know how in the various art programs (or at least in Paint) there's a 'fill tool' that lets you change one body of color to any other color?

I want something like that, except for terrain.

Substitute "terrain level" for color, and that's it.

[archn]

been suggested already but yes

[Twi]

It has?

Cuz I've read literally EVERY SINGLE TOPIC ON THIS FORUM.
Not even kidding.

[UpperKEES]

Here. Second result when searching for 'fill'. ;)