1 files changed, 4 insertions, 0 deletions

diff --git a/sway/sway.5.txt b/sway/sway.5.txt
index 900e499a..59c3295a 100644
--- a/sway/sway.5.txt
+++ b/sway/sway.5.txt
@@ -413,6 +413,10 @@ The default colors are:
         However, any mark that starts with an underscore will not be drawn even if the
         option is on. The default option is _on_.
 
+**opacity** <value>::
+        Set the opacity of the window between 0 (completely transparent) and 1
+        (completely opaque).
+
 **unmark** <identifier>::
         **Unmark** will remove _identifier_ from the list of current marks on a window. If
         no _identifier_ is specified, then **unmark** will remove all marks.