Hi Donovan,
Here is a sample for you:
https://github.com/wp-erp/wp-erp/wiki/CRM-Filters#add-new-life-stage
Note: You can put the lines into the “functions.php” of your child theme (you can also put these lines in the main theme’s function.php too, but if you update your theme anytime, all of your custom codes will disappear. So it is a good practice to use child theme for custom codes)
Thank you 🙂
