|IDL Reference Guide: Procedures and Functions| The ZOOM_24
procedure displays part of a 24-bit color image from the current
window expanded in a new ("zoom") window, and provides
information about cursor location and color values in an
auxiliary ("data") window. The cursor is used to mark the center
of the zoom area, and different zoom factors can be specified
interactively. ZOOM only works on 24-bit color systems. This
routine is written in the IDL language. Its source code can be
found in the file zoom_24.pro in the lib subdirectory of the IDL
distribution. After calling ZOOM_24, windows titled "Zoomed
Image" (the zoom window) and "Pixel Values" (the data window)
appear on the screen. Place the mouse cursor over a 24-bit color
image in an IDL graphics window and click the left mouse button
to display a magnified version of the image in the zoom window.
The zoomed image is centered around the pixel selected in the
original window. Move the mouse cursor in the zoom window to
determine the coordinates (in the