Shortcut to brush styles?

Hi, is there a keyboard shortcut to a brush style/size? It seems that I can’t find it anywhere.

Thank you
Vadim

For resizing the brush/pencil in the viewport…
Hold down the “o” key, the double cursor appears…
Then drag left or right (smaller or bigger)… release the “o” key…
Continue drawing…

Regards
Nolan

Thanks, Works fluently, just what I was after
Regards
Vadim