You have following 3 header sections:
- Header Top
- Header Main
- Header Bottom
This 3 header sections can be activated in the admin panel -> Theme Options -> Footer. There you can also define how many columns you want to have. Just use the slider under the header options. After activating them and selecting your column amount you see the activated header columns as widget areas in the widget panel (admin panel -> Appearance -> Widgets).
To add content to the header columns, just select the widgets you want to have and add them to the header (for example header top 1).
The typography, dimensions and background of the footers can be changed in the Theme Options under Appearance.
If the space between the widgets is too small, just use the space widget between them and define your space size.