diff --git a/src/arg_desc.jl b/src/arg_desc.jl
index da250471..af85b46d 100644
--- a/src/arg_desc.jl
+++ b/src/arg_desc.jl
@@ -30,7 +30,7 @@ const _arg_desc = KW(
     :marker_z           => "AbstractVector, Function `f(x,y,z) -> z_value`, or Function `f(x,y) -> z_value`, or nothing. z-values for each series data point, which correspond to the color to be used from a markercolor gradient.",
     :line_z             => "AbstractVector, Function `f(x,y,z) -> z_value`, or Function `f(x,y) -> z_value`, or nothing. z-values for each series line segment, which correspond to the color to be used from a linecolor gradient.  Note that for N points, only the first N-1 values are used (one per line-segment).",
     :fill_z             => "Matrix{Float64} of the same size as z matrix, which specifies the color of the 3D surface; the default value is `nothing`.",
-    :levels             => "Integer, NTuple{2,Integer}, or AbstractVector. Levels or number of levels (or x-levels/y-levels) for a contour type.",
+    :levels             => "Integer (number of contours) or AbstractVector (contour values). Determines contour levels for a contour type.",
     :orientation        => "Symbol.  Horizontal or vertical orientation for bar types.  Values `:h`, `:hor`, `:horizontal` correspond to horizontal (sideways, anchored to y-axis), and `:v`, `:vert`, and `:vertical` correspond to vertical (the default).",
     :bar_position       => "Symbol.  Choose from `:overlay` (default), `:stack`.  (warning: May not be implemented fully)",
     :bar_width          => "nothing or Number. Width of bars in data coordinates. When nothing, chooses based on x (or y when `orientation = :h`).",