Warthunder Ps4: configure keyboard control?

Ta
- in PlayStation
2

I play Warthunder on the Ps4 and tried it with the keyboard for the first time yesterday. Works fine, but in the control menu (i.e. Where you manage the key assignments) I don't see which keys on the keyboard I'm doing what, the game only shows the controller settings

My question now: Which key on the keyboard can I use to delete a specific key assignment?

Example: I fire with the left mouse button on a tank. The key assignment is "fire main gun - LMT". Assuming I would like to fire with the right mouse button, then I have to delete this "fire with LMT" first. Which key does that work?

st

Delete key or the Delete key

Ta

Thanks.