To zoom in or out

1. Click in the Perspective window to make it active.
2. In the Tool Palette, select Zoom from the View menu or click its icon.
3. Click a mouse button.

To use the mouse

• To create a smaller field of view, click and drag the to zoom in.
• To create a larger field of view, click and drag the o zoom out.
• To increase or decrease the angle of view, click the Dragging up or to the right increases it, and dragging down or to the left decreases it.
  NoteWhen working with a large model, the speed at which the screen is redrawn during a Zoom operation can be increased by decreasing the Motion Precision in the Preferences > Performance options window.

To use the keyboard

You can type the angle of view from the keyboard when the system prompts:

Enter angle of view (ABS):

The values are between 0.2 and 179. Type the angle (preceded by the letter r if you want a relative angle) and press Enter.

Options

Eye/View/Up

You can use these sliders to define a view by positioning the camera. The view is determined by the eye position, view point position and up vector end point. These nine fields contain decimal numbers. They represent, from left to right, the X, Y, and Z coordinates for each of the three camera parameters. To see the camera as you modify it, use WindowDisplay > Toggles > Cameras.

Zoom

The Zoom slider also takes a decimal number which defines the angle of the camera’s field of view.Values must be positive in the range of 0.2 to 179.

NoteFor windows other than the Perspective window (orthographic), two of the three Eye and View values must be the same, and two of the three Eye and Up values must be the same. If they are all different, or are all the same, the results are unpredictable. This is because viewing operations on orthographic windows affect the window rather than the window’s camera.