Figure 6.18: Visualization Parameters: Zoom settings.
See also: dev_set_part.
As opposed to the mouse-based zoom functionality that is available in the tool bar of the graphics window, the tab card Zoom is parameterized. You can specify the bounding box of the visible area of an image, or set the center position.
This tab card specifies which part of an image, region, XLD, or other graphic item is going to be displayed. The four text fields of Set part specify the coordinate system. Upper Left Corner defines the pixel which will be displayed at the upper left corner of the window. Lower Right Corner defines the pixel which will be displayed at the lower right side of the window.
Below the coordinates of the rectangle, you can specify its center.
The buttons Zoom Out and Zoom In activate a zooming with factor 0.5 or 2, respectively.
To get the image's full view back on your graphics window, click the button Reset.
The button Aspect adjusts the parameters so that the aspect ratio of the image is maintained.