\e$BCM$K$OJ8;zNs$dJQ?t$NB>!"\e(Belisp\e$B<0$,$=$N$^$^5-=R$G$-!"$b$7!"\e(BField \e$B$NCM$,\e(B
@code{nil} \e$B$J$i$P$=$N\e(B Field \e$B$r:o=|$7$^$9!#\e(B
+\e$B?F%U%)%k%@$NL>A0$rMxMQ$7$?$$>l9g$K$O!"%P%C%U%!%m!<%+%kJQ?t\e(B
+@code{wl-draft-parent-folder} \e$B$,MxMQ$G$-$^$9!#\e(B
+
\e$B$D$E$$$F!"<!$NNc$r8+$F2<$5$$!#\e(B
@lisp
expression can be specified as is. If the car part is a header field
and the cdr part is @code{nil}, the field will be deleted.
+If you want to use name of parent folder, you can refer the buffer local
+variable @code{wl-draft-parent-folder}.
+
See the next example as well:
@lisp