Hex's core Logic UI is based on the popular notebook format. If you have used a Jupyter or similar notebook, you will be right at home.
Hex, however, extends the notebook model in some key ways:
The left-hand outline provides an easy-to-browse overview of input and output elements from throughout the logic view.
Input elements in the Outline are fully interactive, allowing you to adjust upstream parameters without excess scrolling.
You can click any element in the outline to automatically jump to that position in the logic.
The Outline is a key element of the App view workflow, covered later.
Cell outputs, like charts or tables, are given a default output name (e.g., "Output 3") but you can re-name it by clicking the name anywhere it appears.
Custom output names will then appear as labels in the app view:
In the Logic view, users are able to execute cells in whatever order, which makes for easy iteration and experimentation.
Runs from the App view, however, always run top-to-bottom, meaning logic must be written with that in mind.