From the left panel menu, select the Settings tab near the bottom:

Next, under the SETTINGS in-panel menu, select Carriers:

To add a carrier, click Add Carrier: 

From the EIZ Select Carrier menu, select AP Envelope:

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.