Is there a hotkey in Zbrush to hide all menus on left and right so I have a larger drawing area? I got myself a 13 inch tablet and the menus take up a bit of space
In the Macro palette there are buttons for Left Tray and Right Tray. You can assign hotkeys of your choice to those buttons to toggle the trays open/closed. Additionally hitting TAB on the keyboard will toggle the shelf around the UI.