added documentation about the 'screen' client-pattern

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/asciidoc/client-patterns.txt b/doc/asciidoc/client-patterns.txt
index 5b00e0c..addb12e 100644
--- a/doc/asciidoc/client-patterns.txt
+++ b/doc/asciidoc/client-patterns.txt
@@ -64,6 +64,11 @@ The following values are accepted for 'propertyname':::
 *Layer*;;
         The string name of the window's layer, which is one of
         *AboveDock*, *Dock*, *Top*, *Normal*, *Bottom*, *Desktop*
+*Screen*;;
+        The number of the currently used 'screen'. If the setup of the
+        running xserver involves independant screens ('not Xinerama'), the $DISPLAY
+        environment contains something like ':0.1' or ':1.0'. The part after the
+        dot ('.') is the number of the screen.
 *@XPROP*;;
         A string, corresponding to any xproperty (Use either the *xprop(1)*
         utility or the 'SetXProp' command to set a xproperty to a window)