help-xref-stack

help-xref-stack is a variable defined in `help-mode.el'.
Its value is

nil

• Automatically becomes permanently buffer-local when set.

Documentation:
A stack of ways by which to return to help buffers after following xrefs.
Used by `help-follow' and `help-xref-go-back'.
An element looks like (POSITION FUNCTION ARGS...).
To use the element, do (apply FUNCTION ARGS) then goto the point.