Compass:
— Set a radius and "lock" it in place.
— Move the origin of the compass anywhere, without having to set the radius again.
— Press down to draw an arc (CW or CCW), starting and ending anywhere along the radius.
— Ability to snap to other lines and intersections.
— Hotkey to draw in increments, like 10°, 20°, 30°, 45° etc.
— Ability to draw the arcs as guides to aid in geometric construcion.
Ruler:
— Change the angle of the ruler
— Move the ruler without having to set the angle again
— Press down to draw a line, starting and ending anywhere along the ruler.
— Ability to snap to other lines and intersections.
— Hotkey to rotate in increments of 10°, 20°, 30°, 45° etc.
— Ability to draw the lines as guides to aid in geometric construcion.
+ A fill tool to color shapes.