You can change the invitation format or customize the message that you send to conference participants.
From the Settings tab, click Invitations. The Invitations page appears.
Set the Invitation Handler as either Default Programs or Google.
Set the Invitation Length as either the Long or Short.
NOTE: Use the Short type if the Long type exceeds the length allowed by your browser.
(Optional) Type additional text in the Custom Greeting text box.
Click Preview to see a detailed sample of the invitation that includes the custom greeting.
Click OK to save the format and optional custom greeting.