How to add black mark in scanned pdf and scan it again quickly?

[Jeff Li]

This is a scanned pdf file with black mark, and i think  the black mark is added by Adobe Acrobat because the black mark is too regular and without any noise dots.

The process may be: ( but i think this process is too complex )

1. scan the original paper file to scanned pdf file;
2. add black mark on scanned pdf file with Adobe Acrobat;
3. print step2 file and scanned again;

My question：

If you have a paper file and want to cover some words on it, how do you do?

I think these black mark added in the file, are not by pen and hands, because it is very square without any flaw.

[Bernd Alheit · Accepted solution]

Use the Redaction Tool of Adobe Acrobat Pro.

[Jeff Li]

Hi Bernd,

Thank you.

If you have a paper documents and want to cover some words with black rectangle on it, then scanned covered file to pdf file, how do you do?

[Test Screen Name]

Permanent: black marker pen. Temporary: maybe something like black post it notes? Not sure, people tend to use the redaction tool today.