There’s a module in WordPress called the Customize. It allows you to get into a lot of detail when it comes to customizing your site and design.
To see what’s available, click on the Customize link in the top bar, or go to the WordPress dashboard and then into Appearance → Customize.
The exact scope of the options available depends on the theme you’re using. Still, generally, you’ll be able to adjust things like the site’s layout, headers and footers, colors and backgrounds, typography, buttons, menus, and more.
Go through the different sections and see the effect that tweaking them has on your site – the changes take effect in real-time in the preview pane on the right.
Click on the Publish button (top left corner) if you want to keep the changes.
