funcs is a utility which allows you to browse the functions you can use in STILTS's algebraic expression
language. Invoking the command causes a window to pop up on the display with two parts. The left hand
panel contains a tree-like representation of the functions available - the top level shows the classes
(categories) into which the functions are divided, and if you open these up (by double clicking on them)
each contains a list of functions and constants in that class. If you click on any of these classes or
their constituent functions or constants, a full descritption of what they are and how to use them will
appear in the right hand panel.
The information available from this command is the same as that given in SUN/256, but the graphical
browser may be a more convenient way to view the documentation. There are no parameters.