How can I pass a field value to another field?

How can I test this out on my form. Because when I did the condition it didn't work. I want to keep the applicant from having to keep filling out his address and name multiple times

I tested the feature out and it works. Here's a clone of the demo form shared on the guide where you posted this comment.

https://www.jotform.com/80521989043965

These are the conditions that take care of the task you're hoping to achieve:

I strongly recommend you clone that form so you can study and fiddle around with the conditions setup to copy the value of the email and address fields.

Complete guide: How-to-Clone-an-Existing-Form-from-a-URL

Your reply didn't reach our Support Forum but I received it through my email so I'm pasting it below for everyone's reference:

This is not what I am looking for. To select a button to copy info. What I am looking for is this:

Applicant name is filled out, anywhere there is a reqest for applicant name. This filled is automatcally filled in. Just like whay you can do with a pdf file

The idea would still be the same regardless - The condition you will use is still the UPDATE / CALCULATE FIELD condition, and you will still use the COPY A FIELD'S VALUE as the DO action.

Using the same form https://www.jotform.com/80521989043965 have a look at the random FULL NAME fields I added that will be prepopulated automatically as soon as I fill out the first FULL NAME field.

Below are the conditions I used to pass/copy the value of the first name field to the rest of the name fields on that form: