The reorder attribute tells FeatureCAM to resequence the toolpaths to minimize retractions while trying to avoid full width cuts. Use Reorder when you have a part where several separate regions are cut. If you want the toolpaths to move directly across a surface without worrying about retractions, turn off Reorder.
For Z-level operations (rough or finish), the Reorder attribute will enable zone machining, where the toolpaths will descend in the Z (or –Z) direction if that is more efficient than cutting the entire part in complete Z levels. The phone handset example below shows that the toolpaths will cut the top of the part in complete Z levels and then cut one side and the other.