As with 
Arguments:
| Gaps | Make gaps even rather than spreading points evenly. | 
|---|---|
| First, Last, pcb_crosshair | Two arguments specifying both ends of the distribution, they can't both be the same. | 
Defaults are Marks, First, Last
Distributed objects always retain the same relative order they had before they were distributed.
For non-subcircuit objects: using Marks is not recommended, using Gridless is recommended.