in the settings dialog under the general tab you will see the function keys listed. Choose show trade frame. This will not place a market order but bring up the trade ticket. If you set order to market it will automatically default there.
Trader777, thanks for your help. I have set up a trade ticket with a market order which will pop up with a function key. I guess the default is set to buy. Is there a way to set up another function key to bring up a market sell order ticket? Thanks again for your help.