Documentation | Help File | UI | 2D Mode | Menu | Shape | Smooth shape
Clicking on the Shape/Smooth Shape menu item provides the means for smoothing a shape of the line or polygon type. Lines and polygon outlines naturally tend to be less than fully smooth because they are composed of a series of straight line segments connecting a series of vertices. Smoothening is done by creating additional vertices using an appropriate interpolation rule.
To smooth a shape
Shape/Smooth Shape menu item - the Smooth shape dialog box will appear.Smooth shape dialog box adjust the smoothening quality. Do it by increasing/decreasing the value in the Factor field for better/worse result. After each adjustment, you can preview the result by clicking on the Preview button. The preview is displayed as a red line over the shape.Apply button.
Shift+Ctrl+O key combination.