EditMarks is a great plug-in (http://www.kerntiff.co.uk/products-4-indesign/editmarks) but not all third-party plug-ins can be trusted and not all plug-ins are regularly revised to work with the latest versions of InDesign or InCopy. Having the ability to track edits in layout view without needing to use a plug-in would alleviate the run-around involved with finding, installing and testing plug-ins.
EditMarks is a great plug-in (http://www.kerntiff.co.uk/products-4-indesign/editmarks) but not all third-party plug-ins can be trusted and not all plug-ins are regularly revised to work with the latest versions of InDesign or InCopy. Having the ability to track edits in layout view without needing to use a plug-in would alleviate the run-around involved with finding, installing and testing plug-ins.