I have a custom keymapping where want the quick select sign keysfor the signs on Y X C V B. I have Quen on C. When I select it, Gerald sheaths his sword and quen is selected. There is no bind option for sheathing the sword.... this needs a fix!!

The sword draw/sheath key bindings for keyboard and controller are in
documents/the witcher 3/input.settings

wasnt this fixed in the last patch, when all keys became rebindable?

You can't. Sheathing is not in options at all.

I haven't gone into the in-game bindings too much, but from what I have read on here, the in-game bindings that were added are still a subset of what you can modify using the input.settings file.

The obvious workaround editing the input.settings file. I searched for all ik_c entries and changed its value to another key. Now hitting C does not sheath the sword anymore.

Still, this is an oversight on CDPR's side.