In order to remove a bet that has already been placed, please read the following which details the rules for the different tables:
Blackjack:
Before clicking on the "Continue" button, simply right click on the chip to return it to your bankroll. If you are playing on a Public Table, this must be done before the Default Time Limit has elapsed.
Roulette:
Before clicking the "Continue" button, right-click your mouse over the bet you wish to cancel. The chips on that spot will be returned to your Bankroll. If you are playing on a Public Table, this must be done before the Default Time Limit has elapsed.
Slot Machines:
Click on the "Cash Out" button. This will return all the money in the slot machine ("credit Box") back to your Bankroll. This must be done before spinning the Slot Machine's wheels.
Note: that clicking on "Bet Max" will spin the wheels automatically and you will not be able to reverse your bet. Returning to the Casino Lobby or to the Slots Arena will also return the money back to your bankroll.
Video Poker:
Simply click the "Cash Out" button on the machine. Returning to the Casino Lobby or to the Video Poker Arena will also return the money back to your bankroll.