Hello Josephine,
You can add columns (including custom fields) in the customer section:

Then, you can save your view if this is gonna be a default view.
I think the question shouldn't be in Developers section, but in "I Need help. What do I do", or "Customization".
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I have added new fields to the customer section on clarizen, but I don't know how to get them to show when I create a new customer or when I view a customer. How do I make my 5 custom fields above show in the customer section of Clarizen ? Thanks in advance.