To set header type 2 navigate to Theme Options > General > Header and select type2 to Header Type? option.

You can also:

Header type 2 display:

 

Above the header can be displayed top bar.

Help article about how to setup topbar widgets

In the header are displayed:

Align menu in center

Below css will align menu in center (use this ONLY if you don’t enable the user menu in header). By default menu is on the left and user menu is on the right.

.header_type2 #access{
float: none;
right: 0;
left:0;
margin: 0px;
}

Help article about how to add custom CSS