Books Automation - Change a field when a the Sales Order is changed to a status

Books Automation - Change a field when a the Sales Order is changed to a status

Hi everyone, 

In Zoho Books, I need to change a field when the order status is changed. 

Now, when the user clicks on More --> "Mark as X" (X is a custom status), the Status of the order is changed automatically to X. Then we have a custom field called "X - Reporting Only" that I also want to change to the same status automatically. 

Can anyone give me some advice about how to do this? 

Thanks :)