Customise "Customers" tab

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.5
-- PHP version -- : 7.0
-- Browser(s) name and version -- : Chrome

Hello,

I have created custom user fields for the Hikashop Registration form and would like to display that information under the "Customers" tab. When I click on the "Customers" tab, I can see the list of users. When I click on one of the users, I see three boxes- "Main Information", "Orders" and "Addresses". I would like to display all the additional custom fields filled by the user inside the "Main Information" box. Also, would like to display the same custom fields inside the "Addresses" box.

Also, when I click on the "Edit" icon (shaped like a pencil) inside the "Addresses" box, it opens up a pop-up. Inside this pop-up, I can see the user's information. There is a lot of white space between the field and the information filled. I would like to limit the white space, please.

And, I would like to display the custom fields that are shown in the "Addresses" pop-up in the Joomla "User Profile" tab too with the information that the user has chosen. It's blank!