From the left panel menu, select the Settings tab near the bottom:
![Couriers_Settings.png](https://eiz.zendesk.com/hc/article_attachments/900009141343/Couriers_Settings.png)
Next, under the SETTINGS in-panel menu, select Carriers:
![Couriers_Select.png](https://eiz.zendesk.com/hc/article_attachments/900008203926/Couriers_Select.png)
To add a carrier, click Add Carrier:
![Couriers_Add_Carrier.png](https://eiz.zendesk.com/hc/article_attachments/900008203906/Couriers_Add_Carrier.png)
From the EIZ Select Carrier menu, select AP Envelope:
![Carrier_AP_Envelope.png](https://eiz.zendesk.com/hc/article_attachments/900009141323/Carrier_AP_Envelope.png)
Finally, to link your current AP Envelope account, enter your credentials and click Next. It is as easy as that! If you get stuck, check out the link “Where do I find my API details?” or contact us at EIZ to assist you through the process.
![Carrier_AP_Envelope2.png](https://eiz.zendesk.com/hc/article_attachments/900008203886/Carrier_AP_Envelope2.png)