All components that comes with the standard theme gatsby-theme-docz
can be shadowed. This means that you can supply your own component that will shadow/override the themes component. This is done by placing a component with the same name as the themes component in the "same filepath" as the original component.
For example if you want to shadow the Logo
-component you would have to have the following structure in your folder:
your-site └── src └── gatsby-theme-docz └── components └── Logo └──index.js
If it has the matching folder structure and name the theme component will be shadowed and you can freely edit.