org-export-dispatch-use-expert-ui

org-export-dispatch-use-expert-ui is a variable defined in `ox.el'.
Its value is

nil

Documentation:
Non-nil means using a non-intrusive `org-export-dispatch'.
In that case, no help buffer is displayed. Though, an indicator
for current export scope is added to the prompt ("b" when
output is restricted to body only, "s" when it is restricted to
the current subtree, "v" when only visible elements are
considered for export, "f" when publishing functions should be
passed the FORCE argument and "a" when the export should be
asynchronous). Also, [?] allows to switch back to standard
mode.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.