I am not sure what the prepare index is, but I do agree that the listing of available templates is quite long.
For me, I would like the most used ones at the top. Right now, the order I get is:
The ALL the T1 templates from 2015 down to 2012, THEN all of the T2’s from 2015 and down and so on.
I am way more likely to use a 2015 T2 Template than an NR4 or a T1 from 2012. But I have to scroll through the whole list. And it always opens up fully expanded.
I see from your comment @Cameron that I can customize each one to not appear but the list is long.
So an implementation like the print options (which I think are brilliant). We can deselect what we don’t want, easily create new print options and reorder any which way we like.