Note: not all tags support user-defined variables, please check with your account manager if you are unsure.
Just because a vendor destination variable is not in the tag's mapping toolbox in Tealium iQ doesn't mean you can't send data to it. Whether you need to send data to a location that Tealium iQ doesn't have native support for in the tag configuration wizard or you want to send data to a user-defined destination, you can define that destination via the toolbox.
To start, we will begin just the same way would with any data mapping. On the tags tab, find the tag you want to modify and expand it's dashboard.
Follow along below for step-by-step screenshots