LibreOffice - address label merge (from spreadsheet) From any document in LibreOffice (it can be a Calc or Writer document; doesn't matter), click on File -> New -> Labels: You'll then see this window: Some explanation is in order. The big box is where you're going to construct your addresses. I'll walk you through that. The little check box at the top that has "Address" next to it is kind of nifty.