LuckyClan
Thank you very much for that. It really does help a lot.

But, no matter how I try, I cannot get the brush to remain a 'Dirty Brush'.

Example:
I have 2 areas side by side - one black one white.
Many settings allow me to mix these to grey.
I end the stroke when I have mixed to a grey.
But, how do I keep the brush 'Dirty' - loaded with that grey - so that my next stroke begins with that grey?.

It would seem to me that both 'Clean Brush' and 'Load Brush' unselected should achieve this? i.e. leave the brush colour unchanged at the end of the stroke?
But I can't find any combination to get this to happen.

What am I not understanding, please?

iPad version 2.2.9

I can't find any help for Brush Settings. I am trying to like ArtStudio Pro but so many things to me are not natural. It is like we must always guess.
I would like to use the Ordinay paint brush and the wet paint brush. Can somebody please explain these settings for me?

I understand many but these I do not understand

Brushes Editor
General
   A) Colorise each stroke
   B) Blend Each Stamp

Pattern
   A) Each stroke
   B) How can I insert new pattern or make my own?

Dynamics
   A) Size/Scatter Tilt Effect
   B) Tilt gradation
   C) Angle: Rotation
   D) Fade

Wetness
   A) 1px Spacing Smudge
   B) Blur Radius
   C) Constant Paint
   D) Auto Clean
   E) Auto Load
   F) Load Amount
   G) Paint Duration

Thank you