In other words, every brush I've tried will make a line that varies a bit from thick to thin. Perhaps there is a setting that will solve that problem with a particular brush? I would like my line to be absolutely uniform, even if my stylus pressure changes, and I'm sure there is a way to accomplish this.

Thanks in advance.

Gary

The Basic-1 brush doesn't have size variation or any variation with pressure, neither does the Basic-2 Opacity.
For other brushes, you can open the brush editor (F5) and select the Size (or Opacity, etc) output parameter then disable the pen pressure inputs or any or all of the inputs to prevent variation with pressure, drawing angle, distance, etc.

Yes, your answer is right on the money, that's the effect I want.

Thanks!

Gary