To making changing between the different menus (i. e. between pen settings, eraser settings) easier and less of a reach, being able to swipe between tool menus to choose different settings would be convenient. For instance, assuming the menu is on the left of the screen and we’re currently on the eraser menu, swiping left from the menu to the edge of the screen (1A) would go to the pen menu(1B). Alternatively swiping right from the edge of the screen to the menu from the eraser settings (2A) would go to text menu (2B). I’ve attached screenshots with arrows for 1A and 2A to better explain.