1- Click the Clients button from the menu after logging in to FieldPie.
2- Find the client that you want to add a custom field. (You can access the customer more quickly by using the filter panel.)
3- Click the Edit Client 
button at the left side of the client.
4- Click on the Add Custom Field to Client Information
button.
5- You can create a new custom field by clicking the ADD
button on the pop-up screen. You can add custom fields to the client as many as you wish.
6- Enter a description for the field you just created, and choose whether it is required or not.
7- You can edit the TYPE section according to the new custom field you created.
8- You can complete the process of adding custom field to client information by clicking the SAVE button.