Go to the hamburger menu: Select the Invoices.

Select any Client then click on the Preview and Send Email button on the screen.

Clicking on the button will open a Preview and Send Invoice pop up having Invoice Preview and e-mail format with auto filled Subject, Message.

You need to fill the email ID in "To" or "CC" field as same as you fill the details to send a normal mail. You can also edit message box as per.

Click on Send Invoice button and it will give a success pop up.

Success Alert means invoice has been emailed successfully.