Left-click + Shift (+drag)	add to the selection
Left-click + Shift + Ctrl + drag	pick peaks
Middle-click + drag	move the spectrum around
Middle-click + Shift + drag up/down	zoom in/out
Middle-click + Ctrl + drag	zoom in on the dragged region
Middle-click + drag the edge of the z-scroll bar	in/decrease the plane thickness
Right-click	menu with various options
Mouse-wheel	zoom in or out
Mouse-wheel + Ctrl	move through z-planes