General terms:
* Redacting: This is the most common and general term. It refers to the act of removing or obscuring sensitive information from a document.
* Obscuring: This is a broader term that encompasses any method of making information difficult to read, including blacking out, blurring, or replacing characters.
* Censoring: This term is often used when the information being concealed is deemed inappropriate or harmful.
* Masking: This term is often used in the context of computer security, where sensitive information is replaced with a placeholder character.
More specific terms:
* Blacking out: This refers specifically to the act of covering text with a black marker or similar tool.
* Redaction marker: This is a specific term used to refer to the tool used to redact text, such as a black marker, a software program, or a redaction stamp.
The best term to use will depend on the specific context. For example, if you are talking about a government document that has been edited to remove sensitive information, "redacting" would be the most appropriate term. If you are talking about a student paper that has been edited to remove inappropriate language, "censoring" might be a more suitable term.