[fournm]

For the most part, the quirks are consistent, though.

I mean, it's not intuitively consistent, but basically there are navigation controls with or without having a selection cursor on the main screen (which is usually where the difference is, since navigation and some of the selection keys overlap).

If you look through the keybindings, there are "move selector / cursor" options and then secondary options for all of those, and that's more or less what they map to.