Video
Example, ZigZig repositions the tool after each pass so that the cuts go in the same direction.
Zig Zag cuts in a back-and-forth pattern.
Spiral repositions the tool after each pass to maintain the cutting method (climb or conventional). The tool starts at the outside and cuts inward.
The Minimize Burrs setting may change the direction of the last pass.
Video
Example, Zig, with Minimize Burrs ON