@keycmd{@key{O}, elpher-root-dir}
Open the root page (empty selector) on the current host.
-@keycmd{@key{u}, elpher-back}
+@keycmd{@key{u}\, @kbd{mouse-3}, elpher-back}
Return to the previous page, where ``previous'' means the page where the
page which was displayed immediately before the current page.
@end table