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Customize how you spin, pan, and zoom. You also can customize which mouse button/key-press combinations are used as shortcuts for these tools.

Mouse Mapping The mouse-mapping options enable you to assign actions to mouse clicks and keyboard/mouse combinations. Choose the Spin, Pan and Zoom settings.
Zoom Choose the Zoom drag direction and Zoom with mouse wheel settings
Spin Choose the spin options to Show spin center, Rotate about preselected object and select the spin Speed.
Note: You can also spin, pan, and zoom with the left mouse button by toggling the tools in the Orient group on the Display tab.