Keyboard shortcuts

P - draw a polygon
R - draw a rectangle
C - draw a circle
L - draw a polyline
M - draw a marker
+ - zoom in
- - zoom out
CTRL/CMD + C - copy a selected area
CTRL/CMD + V - paste a copied area
CTRL/CMD + Z - undo last changes
CTRL/CMD + Y - redo the last change
CTRL/CMD + S - save a map copy temporarily
BACKSPACE - delete the drawn object
ESC - exit editing mode
SHIFT + left-mouse-button click - select multiple areas
ALT - disable snapping