Create new maps as needed, or copy and duplicate existing maps and then edit. After copying or duplicating a map by right-clicking it on the map list you can begin editing. Please see the screenshot below.
For example, when editing the [Select Character] map, select a resource from the left as described in Editing a map, and then commence editing by placing the resource on the map view panel on the right.
In the [Boss Field], which is a hunting ground, you can use the drawing tool to place and edit various resources on the map.