How to use Dataview has > first, last, next prev

I created a repeat region and added reft right arrows and bound them to Data View’s next() prevt() they work fine.

Now i am trying to hide them on first and last record.

Hide left arrow with ==1 works great
How do i hide right arrow on last record?

At which point i saw these:


What are they? Tied to hide button on has.last but that didn’t work.

Ok by time i wrote this. i solved it with:

Hide on:
data_view_calendar.pages - ==0

But still i am curious about that HAS section…