(Mode Line Format): Short windows can suppress the mode line and header line.

diff --git a/lispref/modes.texi b/lispref/modes.texi
index 7ac30f227cd72a819c41c0c9753408045f91d62a..8a6978ebacf4a489c6e186092ee548e1a3701bb0 100644 (file)
--- a/lispref/modes.texi
+++ b/lispref/modes.texi
@@ -1082,6 +1082,12 @@ and the frame title.
   The mode line is usually displayed in inverse video; see
 @code{mode-line-inverse-video} in @ref{Inverse Video}.
 
+  A window that is just one line tall does not display either a mode
+line or a header line, even if the variables call for one.  A window
+that is two lines tall cannot display both a mode line and a header
+line at once; if the variables call for both, only the mode line
+actually appears.
+
 @menu
 * Mode Line Data::        The data structure that controls the mode line.
 * Mode Line Variables::   Variables used in that data structure.