* doc/lispref/commands.texi (Interactive Codes): Link to the
Reading File Names node.
and @acronym{ASCII} characters, do not count where @samp{e} is concerned.
@item f
-A file name of an existing file (@pxref{File Names}). The default
-directory is @code{default-directory}. Existing, Completion, Default,
-Prompt.
+A file name of an existing file (@pxref{File Names}). @xref{Reading
+File Names} for details about default values. Existing, Completion,
+Default, Prompt.
@item F
A file name. The file need not exist. Completion, Default, Prompt.