Hae!
I will show you how to convert the map to PNG/color map (It's important to convert the map to PNG, otherwise people won't be able to watch replay, even if both players played with wkTerrainSync module)
Step-1:
Choose a desired map, in the map editor (Left click to regenerate map on small preview, right click to load that map)
Step-2:
Left click on third icon, to preview the terrain and it's objects.
wts1.png
Step-3:
Select your favorite terrain by left clicking on terrain icon.
wts2.png
Step-4:
If you are not satisfied or think there are not enough objects, you can click "Reseed" button to regenerate the terrain with new object placement, do it until you see object placements you like.
wts3.png
Step-5:
Right click on that terrain preview icon to turn it to PNG.
wts4.png
Step-6:
Click exit, now your favorite map is ready. :)
And this is by the way the procedure for preparing maps in kaos league too, gj!