# Header Modification

Header Modification rules add or remove headers in requests and responses.

To remove a header, add the header name in the editor and leave its value empty.

The HTTP protocol allows multiple headers with the same name. In the case you are trying to add a header whose name already exists, there are three options:

• Override: remove the existing headers and add the new one.
• Ignore: leave the existing headers untouched and do not add the new one.
• Append: leave the existing headers untouched and add the new one.