I also use the mouse wheel to scroll and pan, but I don’t pan by clicking the mouse wheel I find it much quicker to zoom out and then zoom back in on the area of interest. Panning by clicking the mouse wheel gives you a limited amount of movement before you have to release, move the cursor and click the wheel again. And on a large board you may have to do that several times. I also use the ‘F3’ key to refresh the screen often to remove drawing artifacts, usually remnants of the cursor. As well as the ‘Home’ key to quickly zoom out and center on the board extents. I never use any of the navigation related items from the context menu. Usually when I need to change the grid I only want to go up or down one level and I use ‘N’ or ‘shift+N’ for that.
On a related note, another way to pan is to hold either the ‘shift’ or ‘control’ key while rotating the mouse wheel. However, while vertical scrolling (shift) works okay horizontal scrolling (control) scrolls on a slight diagonal. Is this a known issue and possibly corrected in V5?
Note: The above is based on version 4.0.x.