Taking Partial Profit On Ib Tws

[Kendrick]

Hi,
Is there a way to put in an order with IB via TWS with partial profit (say half of position to be closed at a specified price)? I have searched and searched and can't find a solution. Bracket order would have done the job but does not allow the order size for the take profit to be changed (defaults to the full original order size).

Thanks