Schematic Symbols: How to hide pins on 17.2 S057

It used to be simple to hide un-used pins in a package, following this guide: Connection Symbol Properties

1. Optional: Setup Pack Short for connected pins.
2. View -> Package
3. Edit -> Properties
4. [x] pins to ignore (hide)

But now it's not that easy:

I set up the pack short (1-3, 2-4):

View package, but then I can't select Edit -> Properties (greyed out):

Did the process change now?

The component in question is a fuse clip (https://www.littelfuse.com/~/media/electronics/datasheets/fuse_clips/littelfuse_fuse_clip_100_445_030_520_datasheet.pdf.pdf) and I'm trying to short + hide the pins as shown here... But curious the new process in general: