JS9 Demo: a supermenu to control multiple displays

A supermenu (a JS9 Menubar whose id starts with SUPERMENU_, and with a data-displays attribute) can control multiple JS9 displays simultaneously, so you can change colormaps, scales, etc. on all displays. Or you can click on an individual display to make it the selected display for the supermenu. (Click that display again to unselect). You can also select a display from a supermenu's File menu, which contains a list of selectable displays. Thus, a supermenu can control several displays collectively or each one individually.

In this demo, we have loaded Chandra (red), Galex (green), and Spitzer (blue) images of colliding galaxies NGC 2207 and IC 2163 into a single display:

JS9 Demos: