On your Calendar View, click on the appointment you wish to send an email.

Click on the “Actions” drop-down button on the appointment details window

Select either the “Send Email” or "Send Text" option.

A new pop-up window will appear at the center. You can select the email template/text template you'd like to send by expanding the drop-down menu.

After selecting the template, click on the Generate Email or Generate Text button.

This will open a new window to let you view a preview, edit the email/text content, and identify which phone number/email you want to send it to in case the customer has multiple contact info.

Click on the “Send Email” or "Send Text" button.