Swap chars that "1", "0", & "#" buttons produce to match keypad printing

[Perifractic]

Firstly thanks for this wonderful app. I'll be featuring it on my YouTube (Retro Recipes) to follow up on a couple of digital minimalism retro phone/flipphone vids I have done recently.

I am using the Kyocera Digno 4 and generally it works well. There's one request that would make this perfect. The physical keypad has characters printed on the keys. Unfortunately these are the opposite of where those characters live in TT9. On the Digno we have:

[1] key: . / @ [0] key: - + [#] key: ` ?

I wonder if there's a way we could have the option to swap which keys produce which characters in TT9. For example, I could move "-" and "+" from [1] so that [0] produces them. And move "@" and "/" from [0] so that [1] produces them.

As for [#] I realise this swaps entry style but perhaps I could specify long press for "?".

These would make things feel much tidier when using TT9 on phones that already have characters physically printed on the keypad.

Many thanks and keep up the great work.