Letters of engagement are broken down into the following sections:
- Introduction
- Scope
- Terms & conditions and privacy notice
- Agreement statements
To customise the copy in these sections:
- Select the Admin settings cog icon. 
- Select Settings.
- Select Proposal manager configuration.
- Select Content.
- Go to Engagement letter library > Letter of engagement.
- Each section is layed out with it's own text editor in the main pane of the page.Use the Tags menu to add mail merge fields into your letter. 
- Make any required changes and select Save.