Parallel Lines are another classic cartooning technique used to create movement on the page or emphasize a character’s emotional reaction.
Thanks to this effect tool, you don’t have to wrestle with a ruler and paper like traditional methods require.

Creating

From the Filter, select Parallel Lines.
A new Parallel Lines will appear on the canvas.
You can use the adjustment panel as seen below to change the lines.

Adjusting

You can also control the length, thickness, and density of the lines to create different effects.