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

B:- From your dashboard, go to the Appearance > Customize > General > Breadcrumb Section
(a) Now Click on the check box for Hide/Show Breadcrum Section.
(b) Now you can manage height in Breadcrumb.
(c) Now you can manage Breadcrumb image.
(d) Click on Publish.