Button formatting to a macro

Hello All,

I am very novice to Marcos and wonder if someone can help guide me. We had an old staff member work together a permit form using macro buttons but have since left our office. I have been asked to add more information to their existing template. I will attach pictures to help you understand what I am trying to explain.

1st, We have a general template with an overview and buttons on the left:

pic 1.JPG

You are allowed to click a button to auto populate the fields:

pic 2.JPG
pic 3.JPG
pic 4.JPG

Could anyone help guide me to what I should be researching on google to add a new button to this template????

Thank you,

Patrick