If you find yourself wanting to save time and speed up your current processes.You can create Macro keys that essentially combine functions into a single button.
For example: Say you want to Subtotal an order and then give your customer a 10% discount you would use the Subtotal button first and then the 10% discount button.
Creating a Macro would cut down this process to a single button press.
Hot to Add Macro:
How to Link Macro: