diff --git a/src/arg_desc.jl b/src/arg_desc.jl
index 9adad50b..62a493e7 100644
--- a/src/arg_desc.jl
+++ b/src/arg_desc.jl
@@ -146,7 +146,7 @@ const _arg_desc = KW(
 :foreground_color_border  => "Color Type or `:match` (matches `:foreground_color_subplot`). Color of plot area border (spines).",
 :foreground_color_text    => "Color Type or `:match` (matches `:foreground_color_subplot`). Color of tick labels.",
 :foreground_color_guide   => "Color Type or `:match` (matches `:foreground_color_subplot`). Color of axis guides (axis labels).",
-:mirror                   => "Bool.  Switch the side of the tick labels (right or top).",
+:mirror                   => "Bool.  Switch the side of both tick labels (right or top). Alternatively, specify `xmirror` or `ymirror` to move the guide and the axis to the opposite position.",
 :grid                     => "Bool, Symbol, String or `nothing`. Show the grid lines? `true`, `false`, `:show`, `:hide`, `:yes`, `:no`, `:x`, `:y`, `:z`, `:xy`, ..., `:all`, `:none`, `:off`",
 :foreground_color_grid    => "Color Type or `:match` (matches `:foreground_color_subplot`). Color of grid lines.",
 :gridalpha                => "Number in [0,1]. The alpha/opacity override for the grid lines.",