To fill out a web lib, simply enter the corresponding information into each input box. When every box has been filled, click Submit. The completed story will appear in the box at the right.
To edit the current web lib, click the Edit button. In the box that appears, you can edit the web lib. To add a 'fill-in-the-blank', type your placeholder text, surrounded by brackets, at the desired place in your story.
You also can give an ID to a particular blank by giving the field any name following a pound symbol (#). You can reuse it by referencing that ID with # in your placeholder.
To share the current web lib, click the Share button. In the box that appears, you can copy a link containing your web lib story (don't worry; the story is not easily visible in the link).