Short key: DO
Donut is used to draw a filled circle of wide ring
Select donut command by short key DO
Enter the inside diameter of ring.
After it enter the outside diameter of the ring.
Press the Esc key for come outside from command.
Then define the center point of donut.
Draw a filled ring of outside diameter 10 and inside diameter 5
Define center point by mouse clicking.
Draw the following diagram in which ring inside diameter is 2 and outside diameter is 4