Hi Petr, that's an interesting idea.

One potential problem is that I think that many people may think the grip was a way to change spacing instead of a way to change the number of items. If you grabbed the grip and moved it only a small amount (not enough to go another row), nothing visibly would change as a result of moving it... That could be a bit confusing.

How does it happen that you want to do an array but don't know the number of items that you want?

Is it because you have more of an area in mind that you want to have filled in? Sort of almost like filling in a hatch pattern or something?

- Michael