The default setting is with the lay on the left hand side. Anyway to reverse the ladder go into preferences under the Ladder Interface tab there is a tick box for reversing the ladder.
Sorry, I don't understand what you require. The default option is already to place lay bets by clicking on the left and back bets clicking on the right.
If you are after the same format as another well known trading application with the same initials then I'm afraid Betting Assistant does not display that format.