The Trading section allows you to manage your existing orders and create new ones.
Insert a New Order
Fill the "New Order" form choosing between Exchange or Margin, inserting the amount, the price and selecting the type of your order.
If you want an overview of what types of orders Bitfinex offers read this article: Bitfinex orders types
When the form is complete you will be able to click the Buy (or Sell) button and a confirmation dialog will appear asking you to confirm your intention to insert the order.
Cancel a Single Order
From the Orders list, tap on the order you want to cancel and a new modal (Order details) will open showing all the information related to that specific order. There you will find the “Cancel order” button. If you click on it a confirmation dialog will appear asking you to confirm your intention to delete the order.
Cancel All Orders
From the Orders list, tap on the button “Cancel All” to remove all orders (of any pairs) from your account.