Is there a way to embed an email template while composing emails?

Yes. Vtiger CRM provides a default set of pre-built email templates that save your time of composing emails. You can create an email template by going to Tools > Email Templates. 

Follow these steps to add an email template to the email body:

1. Open the Compose Email window.
2. Click Select Email Template.
3. Select the parameter you want to base your search on; for example, module name, template subject, and template description. 
4. Select an email template.