@@ -7142,7 +7142,8 @@ value @code{invert} is used, the box edge color is the same as the

 video with inverted luma.

 @item thickness, t

-The expression which sets the thickness of the box edge. Default value is @code{3}.

+The expression which sets the thickness of the box edge.

+A value of @code{fill} will create a filled box. Default value is @code{3}.

 See below for the list of accepted constants.

 @end table

@@ -7205,7 +7206,7 @@ drawbox=x=10:y=20:w=200:h=60:color=red@@0.5

 @item

 Fill the box with pink color:

 @example

-drawbox=x=10:y=10:w=100:h=100:color=pink@@0.5:t=max

+drawbox=x=10:y=10:w=100:h=100:color=pink@@0.5:t=fill

 @end example

 @item

@@ -47,7 +47,7 @@ static const char *const var_names[] = {

     "h",              ///< height of the rendered box

     "w",              ///< width  of the rendered box

     "t",

-    "max",

+    "fill",

     NULL

 };