Zoom Tool

Changes the zoom magnification of a model. The following mouse click and key combinations control how the Zoom tool behaves:

• Click. Click the Zoom tool on a wheel. The current view zooms in by a factor of 25 percent. If you are using the Full Navigation wheel, incremental zoom must be enabled in the Options dialog box for the SteeringWheels.
• SHIFT+click.Hold down SHIFT before you click the Zoom tool on a wheel. The current view zooms out by a factor of 25 percent. Zooming is performed from the current location of the cursor, and not the current pivot point.
  Note: Start the Zoom tool from the Full Navigation wheel. To use CTRL+click and SHIFT+click, Incremental zooming must be enabled in the options dialog box for the SteeringWheels.
• CTRL+click. Hold down the CTRL key before you click the Zoom tool on a wheel. The current view zooms in by a factor of 25 percent. Zooming is performed from the current pivot point, and not the location of the cursor.
• Click and drag.Click the Zoom tool and hold down the button on your pointing device. Adjust the magnification of the model by dragging up and down.
• CTRL+click and drag. When using the Full Navigation wheels or the mini View Object wheel, you can control the target point used by the Zoom tool. Hold down the CTRL key, and the Zoom tool uses the location of the previous pivot point defined by the Zoom, Orbit, or Center tool.
• SHIFT+click and drag. When using the Full Navigation wheels or the mini View Object wheel, zoom in to an area of the model by dragging a rectangular window around the area you want to fit in the window. Hold down SHIFT and then click and drag a window around the area to which you want to zoom.
  Note: Hold down CTRL and SHIFT to zoom in to an area of a model using a center-based window, instead of one defined by opposite corners.
• Mouse wheel. When a wheel displays, scroll the mouse wheel up or down to zoom the view of the model in or out.

Note: On the Full Navigation wheel or the View Object wheel, the point in the view where you click to zoom becomes the Center point for future Orbit operations until you either use the Zoom tool again or use the Center tool. If you press CTRL before you click the Zoom wedge, the Center point does not change.

Zoom Constraints

When changing the magnification of a model with the Zoom tool, you cannot zoom in any closer than the focus point, or out any further past the extents of the model. The direction you can zoom in and out is controlled by the center point set by the Center tool.

Note: Unlike the Zoom tool on the big View Object wheel, the Zoom tools on the mini View Object wheel and the Full Navigation wheels are not constrained.

Zoom the view with a single click

Enable incremental zoom before using the Full Navigation wheels. Change the setting in the Options dialog box for the SteeringWheels.

1. To ensure that Enable Incremental Zoom In option is selected:
   • Display the Full Navigation wheel.
   • Right-click the wheel, and click Options.
   • In the SteeringWheels Options dialog box, under Zoom Tool, select Enable Incremental Zoom In.
   • Click OK.
2. Display the 2D Navigation wheel, one of the Full Navigation wheels, or the mini View Object wheel.
3. Click the Zoom wedge.

   The magnification of the model increases, and you zoom in closer to the model. While clicking the Zoom wedge, hold down SHIFT to zoom out; hold down CTRL to zoom in.

Zoom a view in and out by dragging

1. Display the 2D Navigation wheel, one of the Full Navigation wheels, or the mini View Object wheel.
2. Click and hold down the Zoom wedge.

   The cursor changes to the Zoom cursor.

3. Drag vertically to zoom in or out.
4. Release the button on your pointing device to return to the wheel.

Zoom in to an area of the model by specifying a window

1. Display one of the Full Navigation wheels or the mini View Object wheel.
2. Press and hold down SHIFT.
3. Click and hold down the Zoom wedge.

   The cursor changes to the Zoom cursor.

4. Drag the pointing device to define the opposite corner of the window that defines the area to which you want to zoom.
   Note: If you hold down CTRL while you define the second point of the window, the first point is used as the center of the window. The second point you define is still a corner.
5. Release the button on your pointing device to return to the wheel.

Zooms in and out as you scroll the mouse wheel while a SteeringWheel is displayed

1. Display one of the wheels other than the big Tour Building wheel.
2. Scroll the wheel forward or backward to zoom in or out.
3. Release the button on your pointing device to return to the wheel.