Click on the big logo button to start a browser (Firefox) on 's main HTML help page (oyster/html/oyster.html). These pages provide brief reminders of implemented features. (This page is under construction for the forseeable future.) Some of the widget routines provide HELP buttons. At the IDL prompt, type info for help, help at the IDL prompt. Type info for a list of currently defined IDL variables and available procedures and functions.