1. Start the add-on.
G Merge Plus: Mail & Doc Merge with Attachments will automatically generate the columns requested by the system. These columns will be in green.
Turn the green slider at the bottom right hand corner ON if you want to use automatic blue columns provided by G Merge: Mail & Doc Merge with Attachments. These can be handy if you want to use the Mail Merge function to email your generated documents to recipients
2. Choose a Template from your drive.
Paste the link to a Google Doc or Google Sheet that you'd like to use as a template. (You can also link to a blank one which you can edit later.)
NOTE: The destination folder is "My Drive" by default due to Google's User Data Policy for apps.
3. Select the column names that will become the Document Titles.
4. Select the sharing settings. You can choose not to share the documents, or select a column name that will contain the email addresses of the recipients you will share the document with.
5. Check your tags are all green.
Fix those that are red