Playing a computer on Chess.com

      I am a new member, and I was wondering about playing a computer on this site for a rating.     Is this free or do I need to pay a subscription before I get this?    

It's free - go to live chess and make sure that, under graph options, hide computers isn't checked. Then click on any of the light-green circles on the graph to play a computer.

    Thanks, but I've had no luck in finding Graph Options at all.     Don't see it anywhere.       I did click Live Game and made no progress.

       I only started this site yesterday.      Right away, I played two half hour games against two different opponents.      Both left the board without resigning, and lost on time.     Very disappointed at that.        

      One had a losing position, going a piece down to a discovered check, but rather than resign, this player simply signed out and left, thus depriving me of the pleasure of winning in  the normal way.      ...The other player also disappeared in the middle of the game, and in this case the game was even, so why did he or she leave?      

        This is why I wanted to play a computer instead.     A computer doesn't walk away from the board.       But, reluctantly, I am going to have to leave this site, because I simply cannot bring up the graph mentioned in the previous post.      Thwarted again.