# Guide

> The tiers of the library and how they fit together.

- [Forms](/norns-ui/guide/forms) — `Form`, `Field` and the inputs, wired to `page.actions` errors.
- [Overlays](/norns-ui/guide/overlays) — dialogs, sheets, popovers, dropdowns, tooltips, tabs.
- [Toast](/norns-ui/guide/toast)
- [Behaviors](/norns-ui/guide/behaviors) — the headless actions the overlays are built on.
- [Theming](/norns-ui/guide/theming) — tokens and how to override them.
- [Motion](/norns-ui/guide/motion) — the opt-in animated components.
- [Overriding components](/norns-ui/guide/overriding)