Optional idAllowed zoom directions
Allowed zoom directions when the mouse cursor is over a scale for that axis (but only if mode is also enabled), and disables zooming along that axis otherwise. Deprecated; use scaleMode instead.
Options of the drag-to-zoom behavior
Which of the enabled zooming directions should only be available when the mouse cursor is over a scale for that axis
Options of the mouse wheel behavior
Options of the drag-to-zoom behavior