unity-uilisted

# Unity UI ## Retrieval Sources All paths below were verified with `find`/`ls` against `/media/artiq/FRESH_DRIVE/Books/Unity6/Documentation/en/` on this pass. **Confirmed gap, re-checked and still true:** the local `ScriptReference/` has no API pages for the uGUI package's `UnityEngine.UI` namespace — `EventSystem`, `CanvasScaler`, `GraphicRaycaster`, `Selectable`, `Button`, `Image`, `Text`, `ScrollRect`, `Toggle`, etc. do not exist anywhere under `ScriptReference/` (checked both an `EventSystem*.html` glob and a `UI.*.html` glob at the ScriptReference root — zero hits for either). Only `UnityEngine.UIModule.html` (the built-in, non-package UI module) is present, and it covers exactly seven types: `Canvas`, `CanvasGroup`, `CanvasRenderer`, `RectTransform`/`RectTransformUtility`, `RenderMode`, `AdditionalCanvasShaderChannels`, `StandaloneRenderResize`. For uGUI component APIs (Button, Selectable, EventSystem, etc.), state plainly that local docs don't cover them and fall back to general knowledge, flagging it as unverified against local sources. | Source | Path | Use for | |--------|------|---------| | UI systems comparison | `Manual/UI-system-compare.html` | Deciding UI Toolkit vs uGUI for a given use case | | UI Toolkit overview | `Manual/UIToolkits.html` | UI Toolkit concepts, panels, when to use it | | UI Toolkit intro (systems index) | `Manual/ui-systems/introduction-ui-toolkit.html` | Shorter conceptual on-ramp to UI Toolkit, links into the ui-systems/ subtree | | Bes