To customise the themes 'General' settings, from the store dashboard go to:
> Store Settings > Theme Options > General

From within this page there are many different way to customise your theme:-
'Force heading case' - allows you to alter your heading capitalisation:

'Primary Font' - alter the primary font text to your liking:

'Secondary Font' - alter the secondary font text to your liking:

'Show Breadcrumbs' - shows the path taken to reach a specific page:

'Background image' - adds an image behind the page you decide to upload an image to:

'Product listing layout' - alter where the product categories are shown:

(*Don't forget to click 'Save Changes' after making alterations*)