Every manual email that gets sent from the system (including automated emails originating from a workflow process) must include an unsubscribe link. This helps the recipient control what information is sent to them via email.

There is a mail merge variable named {unsubscribe_link} you can add that allows you to control where and how it looks. That would mainly be useful if you are using a saved email template. If One Church does not find that variable in the body of the email being sent out, it will insert its own automatically (shown below).

To add the unsubscribe link, click on the "Personalize" button and select "Unsubscribe." If using the email template designer (shown below), you can access this menu by first adding (or editing) a text element. 

This will insert {unsubscribe_link} into the body of the email wherever your cursor is currently. When the email is sent, this will automatically be replaced with a link that points to the unsubscribe page. The text will say "unsubscribe" and will be blue in color.

If you would like more control over the design (i.e. change the link color), you can instead use {unsubscribe_link} as the URL for a link. Simple add a link to the email and use the following settings.

The text to display can be anything, but the URL must be {unsubscribe_link}. You can then change the color or other attributes of the link using the text editor.

If someone clicks to unsubscribe or manage preferences, they will be taken to a screen where they can do those actions (see below). 

In addition, a user (or someone with limited write people access) can edit the email preferences from the "Info" tab of their One Church profile. Next to each email, there is a bell icon that opens that same screen.