bring up Think or Swim click on MarketWatch ( 5th to right ) at top of page you can list stocks you want to trade in MarketWatch click on buy or sell side of ticker and will bring up link at bottom of page
you will see....Order Entry Tool......
lower will show order entry.....you can change it as you wish just like you normally do at bottom of page will show any working orders or orders which did not go tru
by clicking on Monitor will show any orders pending or holdings if you have any questions will be more than glad to help