Toon lines are Paint
Effects strokes, so you can hide them using any of those related
methods, or you can turn off the Display In Viewport option
in the pfxToon node. For more information, see
Troubleshoot toon lines.
To hide toon lines
Do one of the following:
Select the toon lines you want to hide
and, in the pfxToon node, turn off the Display In Viewport checkbox.
In the panel menu, select Show
> Strokes to unchecked.
To show toon lines
Do one of the following:
Select the geometry containing toon lines
you want to show and, in the pfxToon node, turn on the Display
In Viewport checkbox.