From The Document Foundation Wiki
- Open your document in LibreOffice
- Click ( ▸ ) from the main menu, and wait for your document to be prepared for redaction (converted to an internal meta-format, and transferred to Draw)
- Do the redaction by using the “Rectangle Redaction,” and the “Freeform Redaction” tools on the “Redaction Toolbar”
- Save & share the in-redaction copies of the document with peers either in the modifiable (odg) or the verbatim (pdf) format at your option
- Once you are ready to finalize the redaction, click the desired option on the “Redacted Export” tool on the Redaction toolbar