To pause an active order in Classic TWS or Mosaic, right-click a working order and select Pause Execution. When you pause a working order, a cancel request is submitted to the exchange and the order is put into an inactive state but remains available on the Orders panel (Mosaic) or Quote Monitor (Classic TWS) for you to resubmit at any time. Please note, the paused order is still included in the value of open but unexecuted orders by the IBKR Credit system because it is queued up and ready to be re-transmitted. To re-submit a Paused order, click on the Transmit button on the order row again.
You can also use the Day 'Til Canceled (DTC) time-in-force to deactivate a day order that has not executed by the close of the market. A DTC order is similar to a day order, but instead of being canceled and removed from the trading screen at the end of the day, the order is deactivated. This means that the order is canceled at the exchange but remains on your trading screen to be re-transmitted whenever you click the Transmit button.
More information on how to pause executions and the DTC time-in-force can be found in our Users' Guide.