If you are on a windows PC, Chemdraw allows you to edit the schemes from Word, but on the Mac, at least in the newer editions, it does not seem to work, so you will need to save the schemes in Chemdraw and then export a copy of the image to Word. I would keep copies of all of the chemdraw files separately, as well as backups of the word doc, as sometimes they get corrupted and the links break.