> For the complete documentation index, see [llms.txt](https://support.docstudio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.docstudio.com/user/envelopes/how-to-add-or-remove-an-envelope-from-a-chain.md).
# How to Add or Remove an Envelope from a Chain
{% hint style="warning" %}
You can add an envelope to a chain only if it isn’t already in another chain.
{% endhint %}
### When to use this
Use chains when several envelopes belong to the same process and you want to keep them connected.
Common cases:
* continue one business process in a new envelope
* group related envelopes for easier tracking
* remove an envelope that was added to the wrong chain
### Add envelopes to a chain
1. Select the envelopes you want to chain.
2. Click the **Add envelope to chain**  icon.
#### Add to an existing chain (merge)
{% columns %}
{% column %}
Use this when the envelope you need isn’t on the same page.
1. Select an envelope.
2. Click the **Add envelope to chain** icon.
3. In the modal, enter the subject or UUID of the envelope you want to add, then confirm.
{% endcolumn %}
{% column %}
{% endcolumn %}
{% endcolumns %}
### Remove envelopes from a chain
You can remove an envelope from a chain only if you added it to that chain.
1. In the envelopes list, select the chained envelope(s).
2. Click the **Remove envelope from chain** icon.