help-window-select

help-window-select is a variable defined in `help.el'.
Its value is

nil

Documentation:
Non-nil means select help window for viewing.
Choices are:

never (nil) Select help window only if there is no other window
on its frame.

other Select help window if and only if it appears on the
previously selected frame, that frame contains at
least two other windows and the help window is
either new or showed a different buffer before.

always (t) Always select the help window.

If this option is non-nil and the help window appears on another
frame, then give that frame input focus too. Note also that if
the help window appears on another frame, it may get selected and
its frame get input focus even if this option is nil.

This option has effect if and only if the help window was created
by `with-help-window'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 23.1 of Emacs.