To use symmetry in Procreate, turn on the drawing guide and click the tab to edit it. Click on the symmetry option and choose whether you want vertical, horizontal, quadrant, or radial symmetry. Use the blue dot to move the symmetry line around your canvas, and the green dot to rotate it.

Is there a Symmetry tool in Procreate?

In Actions > Canvas, tap Edit Drawing Guide. This will take you to the Drawing Guides screen. Tap the Symmetry button on the bottom of the screen. When you first open Symmetry, the Vertical Symmetry Guide is shown by default.

How do you mirror sides in Procreate?