[SalesForce] How to add a Custom Button in Contact Standard Page

How can i add a Custom Button in Contact Standard Page like the Pic belows shows
or where can i get the Default Contact Pagelayout to rebuild it ?

Thanks for Help!

Custom Button in Contact Standard Page like this

Best Answer

Step 1: add a custom button to Contact object by Setup -> Contact -> Buttons, Links, and Actions -> New

Step 2: go to contacts tab and click edit layout link and add your button to page layout.

enter image description here