ToME: the Tales of Maj'Eyal

I messed up my keybindings and I cannot figure out a way to get them back. As usual whenever I would cast a spell, I would hit spacebar to confirm my target. I accidentally binded spacebar to another action. I cleared that particular binding of spacebar, but now I cannot find the correct binding for the default spacebar select-o-matic button.

Please help. Thanks.

ESC (or Game Menu), then "Key Bindings"

I know where kebindings are. I cannot figure out what the default binding for spacebar was.

Space is normally bound to "Talk to People" in User chat.