Cannot modify "Pan the Graph" or "Graph Action Menu" shortcut keys

According to the official blueprint editor cheat sheet “Pan the Graph” is done by holding the right mouse button (and dragging) and showing the “Graph Action Menu” is executed by right-clicking. However, the graph action menu will pop-up sometimes while I am panning the blueprint. This is very frustrating.

Can I change “Pan the Graph” or “Graph Action Menu” keys?

I could not find the shortcut keys in the preferences menu, is there any other way of changing shortcut keys?