Settings for the sender address
In the Preferences under Return Address, you can specify which return address will appear in the window of the envelope.
These preferences are only relevant if you have checked the box that says "Print return address for use with window envelopes" in the letter layout section.
Select an option and enter the required data if you decide you'd rather use a different sender address. You can also edit the sender address to your liking using the placeholders. To add a placeholder to the field, simply double-click on it.
The sender address format lets you decide how your sender address will be printed for use with window envelopes. Double-click on a placeholder to copy it into the field, or manually type it in. Press "Default" to restore the default settings.