Drawing circles

You can construct a circle by:

You can construct:

Notes

If you place the center point of a circle defined by center, enter a value of 20 mm in Diameter and then press TAB to confirm the value, when you point to define the location of the second control point of the circle, you can move the control point only around the preview of a circle with a 20 mm diameter. To drag the object preview freely, go back to the respective edit box (Dx or Dy) and enter 0.00. Then press TAB to move to the alternative edit box.

NOTE: The zero-value rule is valid only for distance values and not for angles, circle diameters, arc radii and radii of auxiliary circles inscribing or circumscribing regular polygons.