P: Brush Tool: change Size, Feather, Flow and Density with simple gestures.

I know of the existing shortcuts but I don't think they work well.

I will go in detail for each one:

To change Brush Size I use my tablet Touch Ring, which is the equivalent of a Mouse Wheel. 

Having to use [ and ] is not good nor as fast not to mention many users don't even have separate keys for square brackets.  

If you don't have a wheel controls of some kind then the Brush Size Shortcut is just bad imo.

Also as of now we are still still limited to steps of 1 instead of 0.1 😞

For Flow, using the shortcut, we can go to 10-20-30-40 etc...again, not good, we need to be able to adjust Flow in steps of 1.

For Feather, using the shortcut, we can only change it by steps of 5 and not 1...again bad!

Erase is a legacy of the past Local Adjsutment system, it is not really a good way to work.

It is much better to Subtract Brush or add a "Correction Brush" if you want to correct the main Brush.

In both cases we will have individual components to precisely see what we did PLUS we can delete the Subtract/Correction brush in case we don't like it... it's much better than using erase.

Alt should definitely be used for the Scrub Gestures.

Scrub Gestures are infinitely better than any of the exisi

Good suggestions.  There are existing keyboard shortcuts, however, for all except Density:

- Increase/decrease size with [ and ].

- Set flow with 0 - 9.

- Hold down Alt / Opt to switch to Erase.

- Increase/decrease feathering with Shift + [ and Shift + ].