diff --git a/turtle3d.scad b/turtle3d.scad
index 3da6bb2..61e64f2 100644
--- a/turtle3d.scad
+++ b/turtle3d.scad
@@ -20,6 +20,10 @@ function _rotpart(T) = [for(i=[0:3]) [for(j=[0:3]) j<3 || i==3 ? T[i][j] : 0]];
 
 
 // Function: turtle3d()
+// Synopsis: Extends [turtle graphics](https://en.wikipedia.org/wiki/Turtle_graphics) to 3d. Generates a 3D path.
+// Topics: Shapes (3D), Path Generators (3D), Mini-Language
+// See Also: turtle()
+//
 // Usage:
 //   turtle3d(commands, [state], [transforms], [full_state], [repeat])
 // Description: