Prettyprinting the current data, retain, call stacks:

.s ( -- )

.r ( -- )

.c ( -- )

Prettyprinting any stack:

stack. ( seq -- )

Prettyprinting any call stack:

callstack. ( callstack -- )

Note that calls to .s can also be included inside words as a debugging aid, however a more convenient way to achieve this is to use the annotation facility. See Word annotations.