Change Polyline Default Global Thickness

I have a drawing that, at some point, was changed to have a default polyline global thickness of 15 regardless of any plot styles. I can change each pline manually to be 0, but new ones are always 15.

How do I go about changing the default so I don't have to deal with these silly thick lines?

I'm assuming you're referring to the polyline width, not thickness

Plinewid=0 (also can be done using the pline command - width option)

To change existing plines use Qselect to select all the polylines and change their global width to 0 in Properties.

Whoops. I definitely meant width. Doing too many things at once today. I had managed to find it in qselect to change everything I'd drawn, but didn't find plinewid!

You're a life saver! Thanks so much!