On the CityEngine toolbar, use the Circular Shape Creation tool 
(Shift+C) to draw a circle. Click the Polygonal Shape Creation tool 
(S) and click the Circular Shape Creation tool (Shift+C) in the Tool Options window 
. You can click Shapes > Circular Shape Creation in the main menu.
Click once to set the center of the circle, move the pointer to define the radius, and click again to finish. See the Tool options section below for shape creation options.
Similarly to the arc mode, you can change how many sides the circle has.
Tool options
The Circular Shape Creation tool includes the following options:
| Circular Shape Creation | |
| Snapping | Turn snapping options on and off in the scene. See Snapping. |
| Radius (m) | The radius length in meters. You can enter a value before or while drawing to lock the radius length. Press Enter to apply the value. |
| Segments | The number of segments the circle has. You can enter a value or use the scroll wheel or the up and down arrow keys to change the number of segments. |
| Force New Shape | Force a new shape to be created, including when drawing intersecting shapes. |
| Force Planar | Force the circle to be planar. Press T to turn force planar mode on and off. See Force Planar. |