How to give the same page layout to all your customers?

When you like the layout of a customer page, you can apply it to all existing and future customers.
  1. Click on Customize in the top-right corner of your screen. 
  2. Go to the Your screens tab. 
  3. Click Apply.
You can do the same for projects and people. 
The page, when you look at yourself, and your home screen do not have this option as they are unique.