Path direction

All paths, whether open or closed, have an internal direction, from their start points to their end points. This is made most obvious when applying a brush stroke that has a distinct beginning and end. However, the path direction can also determine how a complex or compound object is filled, based on the path's Fill Rules. You can always change the direction of a path by selecting the Reverse Path tool  in the Toolbox and clicking anywhere on the path. Alternately, you can select the path and click Reverse Path on the Object menu (or press Ctrl+R). If you reverse a compound path, Expression Design reverses the direction of every subpath.

The same path and stroke, but the path on the right has been reversed.