interaction model

Default interaction model | Zoom: click-drag Pan: shift-click-drag Restore zoom level: double-click
No interaction model | Click and drag all you like, it won't do anything!
Custom interaction model | Zoom in: double-click, scroll wheel Zoom out: ctrl-double-click, scroll wheel Standard Zoom: shift-click-drag Standard Pan: click-drag Restore zoom level: press button
Fun model! | Keep the mouse button pressed, and hover over all points to mark them.