Compositions
Compositions serve as your main Layout entry point. A Composition can be rendered as a page or in a modal. In the future there will be even more composition types to choose from.
Composition List
In the compositions list view, you can create new compositions or edit existing ones.

Create/Edit Compositions
The Edit and Creation Dialogues are identical. In the first step you can set up the necessary meta data for you composition, whilst step two let's you configure your UI
Step 1:

Step 2:

TIP
Widgets might provide configuration options, check them out by hovering over the widget in the dropzone and click the cog