When you drag your SqueezeBox Stack out, you will see the above stack appear on your page.
Choose the number of spaces you want for your SqueezeBox, and other settings for the Setup area.
Choose the stack you want to use for each space, you can use images, columns, text etc. Just be sure if you are going to make this responsive that you use responsive stacks to fill in the spaces.
Choose the styles for the spaces in the stack settings.
Now preview and enjoy! For an summary of the remaining settings please refer to the SqueezeBox Settings section.