In the latest version of Krita I can no longer hold the lower button of my pen and drag to zoom in and out of the canvas. I have a Wacom Intuos medium pen and touch. Is there any way I can get that to work again or is it simply no longer a feature in 4.2.1?

EDIT: After updating my tablet's driver, I can now move the canvas up and down and side to side, however I still cannot zoom. I'm not quite sure how to change that as the Krita canvas input settings only allow shortcuts for keyboard, mouse, and "gesture" (I'm not quite sure what this means). Can anyone help?

Do you have a mapping from pen button to mouse/keyboard action? If so, it should be available in your tablet settings.