Buttons:
Create Polygons: Add new polygons
Move Polygons: Move the entire selected polygon
Delete Polygons: Remove the entire selected polygon
Add Vertexes: Add a new vertex to the center of the pressed edge
Move Vertexes: Move vertexes of any polygon
Delete Vertexes: Remove the vertexes of any polygon
Move Edges: Move any edge
Add/remove horizontal rule: add/remove horizontal rule to any edge
Add/remove vertical rule: add/remove vertical rule to any edge