> For the complete documentation index, see [llms.txt](https://wiki.crosswatch.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.crosswatch.app/crosswatch/settings/configure-pairs/features/playlists.md).

# Playlists

Playlist and collection synchronization uses explicit endpoint mappings.

Choose one Source endpoint and one or more Destination endpoints. Support varies by provider and resource type.

### Membership mode

Choose the lowest-risk mode that fits the mapping:

* **Add only** adds missing Source items.
* **Managed only** removes only items managed by this mapping.
* **Mirror** makes Destination membership match the Source.

{% hint style="warning" %}
Mirror mode can remove manually added Destination items.
{% endhint %}

### Order and limits

Use **Ignore** to synchronize membership only. Use **Preserve** to request Source order where the Destination supports reordering.

Smart and read-only resources cannot be mapping targets. Large removals can be blocked unless the mapping allows mass deletion.

### Related

* Policy and provider behavior: [Synchronization policies](/getting-started/support-matrix/pair-synchronization/synchronization-policies.md)
* Feature selection and rules: [Features](/crosswatch/settings/configure-pairs/features.md)


---

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