You can place orders at the same side of the market, for the same price, and for the same commodity, but with different order types by creating a stacked order.
Drag and drop the orders in the same price field. You can also use the keyboard.
Double-click the stacked order icon to see the details for individual orders. You can also press [+] on your numeric keyboard. Pressing [-] closes the details.
In this image, there are three sell orders for total quantity of 26:
