# Handling categories

Notes can be grouped into categories, which can be used to filter notes, or to give them different icons for an easier visualisation.

<figure><img src="/files/iHH2um7htU5tqmPquCqo" alt=""><figcaption><p>A scene full of notes, whose icons are set to display their category</p></figcaption></figure>

## The Note Categories index

Inside the notes folder (specified in Project Settings), a ScriptableObject of type `Note Categories` is automatically created when first launching the tool.

This SO acts as an index of the categories that notes can belong to. For each category, you can assign a name and an icon.

### Category icons

Each category icon will be displayed in the Scene View for all notes belonging to that category. You can assign any Texture2D contained in the project as an icon.

{% hint style="success" %}
There are about 20 icons provided by default in different colours, and a .psd file that can be used as a template for creating new icons in the same style.

They are found in 📁 `Packages/io.continis.scene-notes/UI/Images/NoteIcons_Category`
{% endhint %}

{% hint style="warning" %}
Icons are only used if the **Icon Displays** setting in [Project Settings](/scene-notes/other/project-settings.md) is set to Categories. If your setting is to display icons for State, you can ignore the icons in the index.
{% endhint %}

## The Categories Overlay

When you choose that note icons display their category, it can be easy to lose track of "which colour represents which category". For this, you can use the Categories Overlay to act as a legend.

The Categories Overlay can be opened by either hovering on the Scene View and pressing the **\`** key (the one next to Shift, on a British keyboard), or clicking on the three vertical dots menu at the top-right corner of the Scene View and selecting Overlays Menu, and then Categories Overlay.

<figure><img src="/files/Q3z0tdwx6d4jqHFnSw45" alt="" width="563"><figcaption><p>The overlay showing 6 categories</p></figcaption></figure>

The overlay also contains a button that acts as a shortcut to the [Note Categories index](#the-categories-scriptableobject), so you can quickly change them or edit their icons.


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