About Using an Alternate Origin in a Flexible Pattern
When you use the Use alternate origin option, the pattern is created as if the pattern leader was located at the alternate origin.
1. Pattern leader
2. Alternate origin
A datum point to use as the alternate origin for the pattern is created before the pattern leader.
A fill pattern is created using the circle template. The Use alternate origin check box is not selected. The concentric circles are centered on the pattern leader.
The Use alternate origin check box is selected. The concentric circles are centered on the alternate origin
You can only select a feature to be the alternate origin if the feature was created before the pattern leader . Any of these features can be used as the alternate origin:
Datum point
Coordinate system
Vertex
End of a sketched curve