Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual page 221

The availability of a navigation tool is dependent on the current wheel mode. Navigation tools include the
following:
Center
Forward
Look
Orbit
Pan
Rewind
Up/Down
Walk
Zoom
Center Tool
The Center tool specifies a point on a model as the center of the current view. It also changes the target
point used for some of the navigation tools.
When using the Center tool, you adjust the location of the center of the current view by clicking and dragging
the cursor. As you drag the cursor, the cursor changes to a sphere indicating where the new center of the
view will be established when the button on the pointing device is released. Releasing the button on the
pointing device pans the model until the sphere is centered in the view and you are returned to the wheel.
The center point defined by the Center tool is used to constrain the Zoom tool and define the pivot point
for the Orbit tool. The Zoom tool is only constrained to the center point when used from the View Objects
wheel unless the CTRL key is held down when using the Zoom tool on the Full Navigation wheel.
To specify a point on a model as the center of a view
1 Display a wheel that has the Center tool.
2 Click the Center wedge. Hold down the button on your pointing device and drag the cursor over the
surface of the model.
3 When the cursor changes to a sphere, release the button on your pointing device.
The model is panned until the sphere is centered.
4 Click Close to exit the wheel.
To specify the target point for the Zoom and Orbit tools
1 Display a wheel that has the Center tool.
SteeringWheels | 183