Since the Give (aka Donate Now) page can be used to accept online cash donations, pledges for "athons", or orders for fixed price items, separate email templates are provided for each use case:
- Invite to Give
- Invite to Pledge
- Invite to Order
Each provides your supporters with easy access to the Give (aka Donate Now) page of your event site. The only difference between these templates: the default text provided is appropriate for the action you're inviting them to take (Give vs Pledge vs Order).
Preview/Edit Desired Template
Go to Admin > Site Settings > Communications > Email Templates, then click on the template name you want to edit/preview: