DocuGen can generate a guide that contains a full list of placeholders specific to your board, including sample data for reference. 

1. Go to Settings > Placeholders and click on "Download placeholder guide"
2. The placeholder document will be generated and downloaded.

If you're having trouble generating the placeholder guide...

1. Check that your profile picture is smaller than 512K. If not, please change it; here is a handy article on how to do this. 
2. Your board must contain at least one item. DocuGen may be unable to generate the placeholder guide if your board is empty.