There is a feature that allows you to print your statements and superbills in a format that accommodates #10 double window envelope.
There is a new button called "Envelope Print".
This button will format the statements and superbills so you can fold them in thirds and insert them into a window envelope.
The envelope style must be a #10 Double Window (4 1/8 x 9 1/2 in) shown above. We recommend buying the security version to prevent someone from holding the envelope up to the light to view the contents.