\e$B=i4|@_Dj$O\e(B 40 (\e$BC10L\e(B:\e$BIC\e(B)\e$B!#\e(B
\e$B$3$NCM$4$H$K%a!<%kCe?.$N%A%'%C%/$r9T$J$$$^$9!#\e(B
+@item wl-biff-use-idle-timer
+@vindex wl-biff-use-idle-timer
+\e$B=i4|@_Dj$O\e(B @code{nil}\e$B!#\e(B
+@code{nil} \e$B$J$i\e(B @code{wl-biff-check-interval} \e$B$G;XDj$7$?;~4V$,7P2a$9$k$H\e(B
+\e$B%a!<%kCe?.$N%A%'%C%/$r9T$$$^$9!#\e(BNon-nil \e$B$J$i\e(B @code{wl-biff-check-interval}
+\e$B$G;XDj$7$?;~4V$@$1%"%$%I%k>uBV$,B3$/$H%a!<%kCe?.$N%A%'%C%/$r9T$$$^$9!#\e(B
+
@item wl-biff-notify-hook
@vindex wl-biff-notify-hook
\e$B?7$7$$%a!<%k$,FO$$$?:]$K<B9T$5$l$k%U%C%/!#\e(B
The initial setting is 40 (in seconds).
Check mail arrival in this period.
+@item wl-biff-use-idle-timer
+@vindex wl-biff-use-idle-timer
+The initial setting is @code{nil}.
+If it is @code{nil}, check mail arrival when the time specified by
+@code{wl-biff-check-interval} has passed. If it is non-nil, check
+mail arrival when idling time exceeds @code{wl-biff-check-interval}.
+
@item wl-biff-notify-hook
@vindex wl-biff-notify-hook
This hook is run at the arrival of new mail.
removed by deleting the associated message in @samp{'flag} folder.
@item
-The messsage won't be deleted by removing
+The message won't be deleted by removing
@samp{important} flag in @samp{'flag} folder.
@item