Sunshine Pro theme header area has 5 main section: before header widget, logo title or image area, header right widget, primary navigation area and navigation extras widget (which includes Sliding Panel right widget).
Before Header widget area
1. In WordPress Dashboard, go to Appearance > Widgets.
2. Add a widget to the “Before Header” widget area.
Recommended widget types for this widget area: text widget, simple pro banner widget, email subscription box (using enews extended plugin).
Title & Description Text
1. In WordPress Dashboard, go to Settings > General option to edit the Site title text and the description text
2. By default the Site Title and the description text will display as center aligned. However, if you add any widget to the header right widget area, then the title and the description text will become left aligned automatically.
Display logo image
1. In WordPress Dashboard, go to Appearance > Customize option.
2. Expand the Header Image option from the left panel.
3. Click Add new image button to select and upload a new logo image.
Note: The default logo image size is 300px (width), 70px (height). To upload a bigger sized logo image, use retina logo image option. Also, you can upload a different logo for mobile users.
Header Right widget area
1. In WordPress Dashboard, go to Appearance > Widgets.
2. Add a text widget to the Header Right widget area.
Recommended widget types include: text widget, custom menu widget.
Next step:
Configure navigation menus, nav extras & sliding panel widget
More Info:
How to upload a retina logo image
How to upload & display a different logo to mobile visitors