If you need to create quick taglines, headlines or blocks of text you may use the tagline groups in Youzign.
The process is the same as using logo groups. Only different is that you should select the taglines instead : )
The taglines are currently located in the Youzign editor sidebar under Graphics>Vectors>Blocks
Make sure to save your tagline as a group after creating them so that you can reuse them in your designs!