I want Custom menu link & soc media buttons to open in new window

I want Custom menu link & soc media buttons to open in new window. Any idea how to make this happen?

 

1.For your first issue
Go to
Appearance > Menus

and follow the instruction as shown in image given below




2.For your second issue

Go to header.php present in your theme directory and add the code given below

Code:

TARGET="_blank"

Sending image for reference




Use same process for others also.