Swap brushes to save time when only using two brushes. You can use one brush, then return to the previous one.
Swapping between brushes in Sketchbook Pro for desktop
Use one brush, then return to a previous one. After using the first, select another, then in the Lagoon, tap 
and flick toward 
, or press hotkey S to move between them.
Swapping between brushes in Sketchbook for mobile
You can swap brushes from the marking menu 
. Choose to switch between the last two brushes.
You can also set acorner hotkey or tap/swipe gesture to Last Brush. Set these in Preferences.
