Lost ZBrush Function?


Hello, I was wondering if anyone knew how to use the Ctrl + Drag (Mask Brush) and Ctrl + Shift (Select Brush) with in the open space of the window just outside of the document. In older versions of ZBrush you were able to use these two functions in this space. It made for much smoother sculpting, especially when you were zoomed into an object that took up the entire document. Now you can only use zoom, pan and rotate functions in this space. These functions changed after last year’s update for 2020. I hope this makes sense. I attached a screen shot. Any help is appreciated.

Thank you