There's this button on the right side of the screen.

This may do, for now. I'm hesitant to add too many features until I have a better idea of what's happening in different parts of the world (though a lot of that would be too granular to appear on a map of this size, and I can always continue to iterate this map as things develop).

Agreed! Thank you for the suggestion. And once I add more vegetation and other features, there won't be so many large stretches of the grass.

Widened the edge fade on most of the terrains -- considerably wider on the grassy ones, less so on some of the others.

Starting to add more forests and farmland. Also need to add more natural features like volcanos and cliffs.

Okay, here's the next iteration. I removed the snowcapped mountain ridges and replaced them with larger ones, and then added ridges and ripples to the other mountain ranges. Added some vegetation but more to come, along with other sorts of terrain. I have a feeling that this map will be constantly tweaked as I dive in deeper to various areas and decide what goes there. Of course, tons of things wouldn't register on a map of this scale, like a swamp that's only a few miles across.