1. Configure your document
2. Create new tokens inside your Sketch file
3. Export data to Hubble.app

• Design tokens: can be considered as the building blocks for your design. A design token can be a color, border, text style...
• Artboard format: one of the unique formats that are used to extract your data from Sketch.
• Primitives page: the page in your Sketch document containing all your tokens.

If you want to add images, please check out this documentation locally. It contains an assets folder where images can be stored:

$ git clone https://github.com/inthepocket/hubble-sketch-plugin.wiki.git
$ ls -l assets/