When you make redlines on a document in a comment, they appear only in the comment. The redlines are not saved in the source Meridian Enterprise vault unless and until the document is imported back into the vault.
To redline a document in a comment :
For information about the AutoVue redline tools , see the AutoVue documentation that is available in the Meridian Enterprise distribution package and at the Oracle website. This includes the Oracle AutoVue Userʹs Manual in several languages and a Supported File Formats document that lists the supported file formats.