Yet Another Mail Merge's full documentation can be found on their website's help section: https://yamm.com/help/. A breakdown and step-by-step tutorial video is also provided by YAMM: https://www.youtube.com/watch?v=2YH6oIik-Ns The extension is available for all users in the VCU Google domain that have access to both Gmail and Google Drive and will already be installed and can be located under "Extensions" in Google Sheets. 
|