Use the Arc Editor dialog to edit an arc or circle. To display the Arc Editor dialog, double-click on an arc when the Curve Editor tab is displayed.

This dialog contains the following:
— Enter the radius or diameter of the arc or circle.Span angle — 135
:

Span angle — 270

Make full arc — Click to convert an arc to a circle.Converts this:

to this:

Reverse the arc — Click to reverse the direction of the selected arc.Converts this:

to this:

Lock arc centre — When unlocked
, enables the arc centre to move. When locked
, fixes the location of the arc centre.
Centre / Through position — Click to use the Position dialog to enter the coordinates.