help;
Prints a list of all the top-level commands, as shown in
Figure 1. The command ? (with or without a
terminating semicolon) has the same effect.
describe funname;
This gives a description of function funname, including the
documentation from the manual [1].
apropos name;
This prints the names of all the NESL functions and variables that
contain the string name in either their name or their
documentation string.
show code funname;
This displays the NESL code for function funname. Code
cannot be shown for primitive functions.