Zooming

Two types of zooming are available in all iTools: Canvas Zoom, which increases or decreases the magnification of the entire display canvas by a specified percentage, and View Zoom, which zooms in or out on a specific portion of the display area.

Canvas Zoom

Canvas Zoom increases or decreases magnification of the entire iTool window without moving the observer's "eye."

Select Window ® Canvas Zoom and select a percentage from the list.

To increase magnification, choose a percentage greater than 100%.

To decrease magnification, choose a percentage less than 100%.

Select 100% to return to the default magnification.

View Zoom

View Zoom increases or decreases magnification at a specific point in the iTool window. This is similar to moving the observer's "eye" closer to or farther away from the object. The two ways to view zoom are using the view zoom button or by using the view zoom pull-down menu.

Click Zoom

on the toolbar to enter Zoom mode.

Position the mouse pointer on the viewplane. The pointer changes to a zoom pointer

Do either of the following:

Drag the zoom pointer toward the top of the iTool window to enlarge the display

Drag the zoom pointer toward the bottom of the iTool window to make the display smaller

Click on the arrow Select button to leave Zoom mode and return to Select mode. The mouse pointer changes to an arrow pointer. In Select mode, dragging the arrow pointer positions the zoomed image.

The view zoom combobox is located just to the right of the view zoom manipulator button on the toolbar and always reports the zoom factor of the currently selected view. You can also use this combobox to set a requested zoom factor for the currently selected view by simply using the pull-down menu to select a value.