1 files changed, 6 insertions, 2 deletions

diff --git a/sway/sway.5.scd b/sway/sway.5.scd
index 73a01152..31ab281b 100644
--- a/sway/sway.5.scd
+++ b/sway/sway.5.scd
@@ -489,9 +489,13 @@ The default colors are:
         setting an integral scale factor and adjusting the font size of your
         applications to taste.
 
-*output* <name> background|bg <file> <mode>
+*output* <name> background|bg <file> <mode> [<fallback\_color>]
         Sets the wallpaper for the given output to the specified file, using the
-        given scaling mode (one of "stretch", "fill", "fit", "center", "tile").
+        given scaling mode (one of "stretch", "fill", "fit", "center", "tile"). If
+        the specified file cannot be accessed or if the image does fill the entire
+        output, a fallback color may be provided to cover the rest of the output.
+        __fallback\_color__ should be specified as _#RRGGBB_. Alpha is not
+        supported.
 
 **output** <name> background|bg <color> solid\_color
         Sets the background of the given output to the specified color. _color_