When a client receives a proposal, the default setting for the email button text is
"Read Your Proposal":
This can be edited under:
Settings > Proposal Branding > Email appearance > Change the email button text
You might want to edit this text if you use Better Proposals to send other types of documents (for example Reports, Statements of Work, or Digital Sign-off).
So changing the button text to "Digital Sign-Off Enclosed" here...
...will show up on the email when your client receives the document.
For each different type of document, we would recommend duplicating your brand and having one set to "Read your proposal" and one set to "Read your report" for example. Just click the green plus icon in the top right hand of your screen.
For more on how to create a new brand click here.