Setting a Custom Header Image
You can add an image to your Hustle Express header space very easily. Launch the Customizer and click on the Header Image tab on the left and click the Add new image button to upload your header image.
Setting a Custom Background Image
You can add a background image to your Hustle Express background very easily. Launch the Customizer and click on the Colors & Background tab on the left. Next click on the swatch for the current background color, and choose a color from the swatches below, or use the color picker to select your own custom color.
You can also select a background image instead, by clicking on the Select Image button, and uploading your own background image file.
Setting up your navigation menus
By default the Hustle Express theme displays one navigation menu in your header space. There is also an optional secondary top navigation navigation menu you can activate.
You can customize these two navigation menus with menus that consist of pages, categories and external links all combined in whatever order you like. Go to My Site → Menus and start creating your own custom menus. You can assign your menu to either the Primary Menu area or the Top Menu area.
Find out more about this on the WordPress.com Custom Menu help page.
In the theme demo site, you will see a thumbnail displayed next to each blog post. You can set a custom image to display for your posts as well, by setting a Featured Image. When you create a new blog post in the WordPress.com editor, you can click on the Featured Image tab on the left and follow the steps to upload your image.