> For the complete documentation index, see [llms.txt](https://tools.continis.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tools.continis.io/subassets-toolbox/editor-workflows/adding-sub-assets.md).

# Adding Sub-Assets

## Drag and drop

To add one or more Sub Assets to an existing asset, simply select the ones you want to add and drag them on top of another asset.

<figure><img src="/files/H63Cy6s5C5SVkO6cfy0v" alt="" width="375"><figcaption><p>Dragging SecondaryMission_1 on top of MainObjective</p></figcaption></figure>

You will be presented with a popup:

<figure><img src="/files/7LfqAr77IbR5QKxaYkUq" alt="" width="375"><figcaption></figcaption></figure>

**Add**

By choosing to just Add, the dragged asset will be added as a sub-asset to the destination and disappear from its original location.

<figure><img src="/files/VEJS54ZdRbDvjmJhm2rA" alt="" width="316"><figcaption><p>SecondaryMission_1 is now a sub-asset</p></figcaption></figure>

**Add and Keep Original**

By choosing this the original asset will stay in its place, and a new copy will be added to the destination. In this case, all references to the original asset will be preserved.

<figure><img src="/files/5truXrQf1qf7CcSCnJew" alt="" width="296"><figcaption><p>SecondaryMission_1 is now a sub-asset,<br>but the original is also preserved</p></figcaption></figure>

{% hint style="warning" %}
It's not possible to add sub-assets to assets that already feature sub-assets as a result of the import process.

For instance, adding sub-assets to an **.fbx model** will result in nothing, because as soon as the asset saves, the import process will reset the sub-assets to the default ones.

See a list of the types that can't be added as sub-assets on the [Exceptions page](/subassets-toolbox/changelog.md).
{% endhint %}

## Create a new sub-asset

It is possible to create a new asset directly as a sub-asset. Simply right click on the destination main asset, and use the Create menu:

<figure><img src="/files/aGdLFQieO4bUOdI63hTl" alt="" width="563"><figcaption><p>Using the Create menu while an asset is selected, to create a new Material</p></figcaption></figure>

Once you select the asset type, the new asset is created and you can give it a name, like usual:

<figure><img src="/files/5SXUCBZO1fK7c9WFILKP" alt="" width="294"><figcaption><p>Renaming the new asset</p></figcaption></figure>

Once the rename is confirmed, the new asset will be added as a sub-asset to the previous selection.

<figure><img src="/files/JpJ0tvLIRTV1akjkNwFs" alt="" width="259"><figcaption><p>The new Material is now a sub-asset</p></figcaption></figure>

{% hint style="success" %}
**Preserving References**

When adding a sub-asset using drag and drop, normally the references to the original asset will break. SubAssets Toolbox has a way to prevent this, and you can find more about it in [Patch References](/subassets-toolbox/editor-workflows/patch-references.md).
{% endhint %}

## Renaming sub-assets

To rename a sub-asset, select it and use **right-click > Rename Sub-Asset**. You can also select it and hit Enter (on Mac) or F2 (on Windows).