Switching Between the Spin, Pan, and Zoom Commands

While one of the Spin, Pan, and Zoom commands in the status bar is active, you can switch to any of the others using the Ctrl and Shift keys.

Active Command Press and Hold
Spin Ctrl to Zoom
Spin Ctrl+Shift to Pan
Pan Ctrl to Zoom
Zoom Ctrl+Shift to Pan

While holding Ctrl to Zoom, you can use the LMB or the mouse wheel for zooming in and out.