See ground:Line the crosshair up on a corner hidden by a tree, then tap "Add point at crosshair".
Pick an area type, then click the map to outline it. Click "Finish shape" to close each one.
Instant quote
--
Tip: click points around an area, then "Finish shape". Trees in the way? Drag the "See ground" slider to make your outline see-through, tap "+ Zoom" to get closer, and line the crosshair up on corners hidden under branches with "Add point at crosshair". Repeat for each surface.