To Draw Isometric Circles

1. Click Tools menuDrafting Settings.
2. In the Drafting Settings dialog box, Snap and Grid tab, under Snap Type, select Isometric Snap.
3. Click OK.
4. Click Draw Ellipse Axis, End.
5. Enter i (Isocircle).
6. Specify the center of the isocircle.
7. Specify the radius or diameter of the isocircle.