How to print envelope from letter address

I can’t find a tool to enable me to print an envelope with the address used in a letter

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The question sounds a bit as if the OQ hopes for sorcery.

An address “used in a letter” isn’t supposed to be a data source for printing an envelope. In many cases it will even not be sufficiently formatted for the purpose.

You need to use a data source containing your addresses for the creation of the envelopes, and also for the address field of the letter - if any. This is “mail-merge stuff”.

I personally don’t like mail-merge, and don’t actually need it because the number of letters I send daily is far below 1 by average meanwile. (I am retired.)

Anyway I still use a thoroughly designed letter template I made many years ago, which even allows for its sender and address frames to be used for the printing of envelopes. To date I never did it, but it was kind of fun to write the needed code. It works for me.

See attachments. You may need to adapt them regarding your environment.

briefVorlage.ott
umschlagVorlage.ott
umschlagBeispiel.odt