You can go to Menu > Settings > Client Engagement > Email Templates. When editing or creating a new template, select the box for "Is Virtual Visit Template".
When this option is selected for an email template, an example email content is generated with virtual visit merge fields. You can update the content or enter your own.
For more information on creating and editing email templates, see How do I create an email template?
Once a virtual visit email template is created, it is available for selection from virtual visit email.
Merge fields specifically available for virtual visit email templates are:
%virtualvisitappt% - virtual visit date and time
%virtualvisiturl% - virtual visit participant link
%virtualvisitpassword% - virtual visit password