A:- Hide/Show Sticky Header
(a) From your dashboard, go to the Appearance > Customize > Header > Sticky Header Section
(b) Now Click on the check box for Hide/Show Sticky header
(c) Click on Publish.

B:- How to change Header Style?
(a) From your dashboard, go to the Appearance > Customize > Header > Header Style Section
(b) Here you can choose Header Style.
(c) Click on Publish.

C:- How to change Above Header?
(a) From your dashboard, go to the Appearance > Customize > Header > Above header Section
(b) Hide/Show Header Office Detail.
(c) Here you can manage left header office detail.
(d) Hide/Show Social Media Icons.
(e) Here you can manage social icons as per your choice.
(f) Click on Publish.

D:- How to manage Header Navigation?
(a) Now Click on the check box for Hide/Show Search.
(b) Now Click on the check box for Hide/Show Cart.