I saw a player play in CC at Genting that using customer key to play, I was thinking it's very easy to set, but i tried many times it not working, so I decide to post here and ask those professional of Dota here.

The custom key I mean is, I saw the player use the bottle without pressing the number, I notice that he just use "W" key if not mistaken, and he wind walk without using number key also.

Get my point? If so hope any pro know about this do reply :-)

Thanks.