Follow this step by step tutorial to learn how to Redact using different Redaction tools in Adobe Acrobat. Don.
You may not be aware that Acrobat has a redaction tool because you've never seen it. If you are using the free Adobe Acrobat Reader, then you are missing this.
I can't find the redact option in Acrobat X Standard to black out confidential information in a pdf.
Adobe redaction tool - Flash
that redaction codes are text entries that you can save, adobe redaction tool,