Create geometry with the same precision as coordinate entry but more efficiently
Polar Tracking F10 极轴追踪
Tracking the angles
2. Increment angle: stepping angle
3. Additional angles: fix angle
7. Relative to last segment
PolarSnap F9
Snap the distance
2. Polar distance: stepping distance
PolarSnap forces the cursor to move in increments only when the angle of the cursor is equal to a polar tracking angle increment
With Polar and PolarSnap turn ON, geometry can be draw without the keyboard input
