Awesome program!  I have a battle map use case where my TV is nicely sized for a 21x38 square grid.  I can fill it vertically but not horizontally.  I realize this is not as simple as increasing the number of grid spaces available (it maxes at 25 currently) due to the ortho camera being in the same place.  There's also the issue that the maps themselves are squares but I can get around that by zooming to subsets of it.  I can take gridless ortho videos and add custom grids at the moment but I use the grid in Flowscape for placing things like trees and rocks in specific places for gameplay aspects.

I guess my hope is that given my scenario and concerns a solution is there somewhere.  Again, Flowscape is fantastic and particularly great for making battle maps.  Thanks!