How to sketch and automatically have the strokes mirrored, either bilaterally or radially.
Choose Paint > Paint Symmetry > Modify Canvas Brush Symmetry
In the option box, set Symmetry Type to Bilateral
The axis of symmetry appears as a dotted line.
Modify the axis in the following ways:
Select any brush and start sketching.
Everything you sketch on one side of the axis automatically gets drawn on the other side, as a mirror image.
Choose Paint > PaintSymmetry > Modify Canvas Brush Symmetry
In the option box, set Symmetry type to Radial, and Num Radial Sections to the number of sections.
A number of axes of symmetry (equal to the value of Num Radial Sections) appear as dotted lines radially emanating from a center point.
Modify the axes in the following ways:
Select any brush and start sketching.
Everything you sketch within one of the sections automatically gets drawn in all the other sections, creating a sort of kaleidoscopic effect.
Do one of the following to toggle off symmetry: