⌘ + ↑ / ⌘ + ↓ to navigate document

I was surprised to see ⌘ + ↑ & ⌘ + ↓ taken as Collapse / Expand menu item shortcuts. In all other macOS document editors, those navigate to the top or bottom of the editable area.

2 issues –

1. I never saw them work as expected. I had a node with nested children, and I was never able to collapse or expand them.
2. Even after removing those assigned shortcuts, I would still expect those to navigate to the top or bottom of the currently editable area.