Wall Tool Active: Click and drag to create walls
Select an element to edit properties
Ctrl/Cmd+Z - Undo
Ctrl/Cmd+Shift+Z or Ctrl/Cmd+Y - Redo
V - Toggle 2D/3D View
R - Reset Camera/Zoom
+/- - Zoom In/Out
G - Toggle Grid (2D)
M - Toggle Measurements (2D)
S - Toggle Snap to Grid (2D)
Delete - Delete Selected