# Classes and Layers

Source: https://help.malighting.com/grandMA3/2.4/HTML/patch_classes_layers.html
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Fixtures can be organized and grouped in both **Class** and **Layer**.

It is inherited from the MVR (My Virtual Rig) import and from the CAD drawing programs, where fixtures can be organized using classes and layers.

In grandMA3 there is no real difference between a class or a layer.

Each fixture can have one of each assigned.

The class and/or layer can be used when applying [filters in the patch](/grandma3/2-4/patch_add_fixtures/#filter).

Classes and layers can be created manually.

## Create a Class or Layer

The following description is for a layer, but the process is the same for classes. Just exchange all the places it says "Layer" or "FixtureLayer" with "Class".

1. Press Menu.
2. Tap Patch in the menu pop-up -> this opens the patch menu.
3. Activate Full columns in the title bar.
4. Activate Split View in the title bar.
5. Tap Layers.
6. Tap the location in the list where the new layer should be or tap New Fixture Layer at the bottom of the list.
7. Tap Insert new Fixture Layer.

A new class or layer is now added.

The name can be changed.

Classes and layers can also be created by editing the class or layer field for the fixture. See the description below, but instead of selecting an existing class or layer, tap New. This creates a new class or layer, and the name pop-up appears to give the new class or layer a name.

## Assign a Class or Layer to a Fixture

Classes and layers can be assigned to fixtures in the [patch menu](/grandma3/2-4/patch_add_fixtures/) when it is in **Full** column mode or when the **Split View** is active in layers or classes.

When the column mode is full, they also appear as options in the Fixture Wizard (read about it following the link above).

Editing the class or layer cells opens small select pop-ups where the existing classes or layers can be selected. There is also the option to select **None**. This can be used to remove a class or layer from a fixture.