Q-retropie-keysetting-dreamcast?

When I install Redream, the emulator of dreamcast, in retropie, it was fast and ran well. but when I run it, that was mapped automatically with clockworkpi uconsole (pad), there are only five keys available. x,y,a,b,start

I tried to apply the key to the keyboard because I wanted to set it up as a keyboard, but redream only recognized it as clockwork pi uconsole pad butten and the keyboard was not set up.

So I changed the name of the keyboard settings to “clockworkpi uonsole” and tried, but it was changed to 5 pad buttons again.

How do I set the key to run redream on RetroFi to add direction keys or other buttons?

Would it be a bad idea to install a dreamcast emulator on a retropie?