The viewer window provides interactive commands; for help press h or H from within the window

Some examples of interactive commands that can be used in the viewer window include zooming in or out, panning the view, selecting and highlighting specific elements, and adjusting the display settings. By pressing 'h' or 'H', users can access a help menu that provides more information on these and other available commands. This can be useful for learning how to navigate and interact with the viewer, as well as for troubleshooting any issues that may arise.