SolidWorks 2017 SP5

I have a user that recently started working on an HP X360 with a 35" (I think) 4k screen.

He is asking if there is any way to change the default line thickness when sketching in a part (not a detail drawing)

My thought was that would defeat the purpose of 4K, but that is another topic for another time

I know how to create layers in detailing, but can't really find a way to propagate that to part mode sketches

any thoughts?

thanks,

Brian