You could change any settings for your site and check it with time preview.
Yould change layout for you site to full width or boxed view.
Yould change layout, logo, icons, background, typography, etc. in header options.
Yould change layout, widgets, copyright info, menus, backround, typography, etc. in footer options.
Yould ould set special menu for each page. Typography and colors are all customizable.
Page Title Bar
You could change layout, background, paddings, etc. in page title bar options.
Yould ould change layout, width, typography in sidebar options.