What are custom code conditions?
Why was my custom code condition 'check-in is in [less than/more than] days' not honored?
What are Custom Codes?
How can I use custom codes without conditions?
Can custom codes have the same name?
Where can I see all available custom code conditions?
Can custom codes include short codes and other custom codes?
How do I include custom codes in my templates?
Tutorial: Offering to extend a booking
How do I create a custom code?
Custom code for requesting flight number