File:
NewClear the terrain and track to start new
Open TrackOpen a track file
Save TrackSave the current track file

Edit:
UndoUndo the last terrain modification

Markers:
Auto-SmoothToggle Auto-Smoothing on and off
Marker Size 1Set the marker effect area size to 1
Marker Size 2Set the marker effect area size to 2
Marker Size 3Set the marker effect area size to 3
Marker Size 4Set the marker effect area size to 4
Marker Size 5Set the marker effect area size to 5

Area Tools
Smooth AreaSmooth the marked area
Erode AreaErode the marked area
Flatten AreaFlatten the marked area
Mark AreaSet area between Primary markers as Primary

Tools
Make WalkwayConvert primary markers to a walkway
Make WaterwayConvert primary markers to a waterway (river/lake)
Apply FilterApply a filter to the terrain (either to area or full terrain)
Convert Primary MarkersConvert primary markers to secondary markers
Unselect All MarkersUnselect all markers