[bsoriano]

Not possible. But you can achieve something similar with ListItem.SortLetter. Just place it before the list begins.

Edit:
And nope. It only works with a ascending/descending A-Z sorting. I hide it in the other cases. Take a look at my implementation example: https://github.com/sualfred/script.embua...-to-letter

@sualfred , thanks! I am not sure how to go about using SortLetter.  Any code I could take a look at? Thanks.

Regards,

Bart