Microsoft Word 2007 allows you to track the changes that an editor makes on a Word document so that the original author can see edits and comments much the same way he would if an editor had written comments and made changes on a written piece. When you are tracking changes, you can change the colour that MS Word uses to display your edits. This can be useful if you want to highlight certain edits to make sure they catch the original author's eye.
Enable "Track Changes" by clicking the "Review" tab at the top of the screen and then click the icon above "Track Changes."
Click "Track Changes" and select "Track Changes Options" from the drop down menu.
Click the down arrow next to "Color" on the same line as "Insertions" to select the font colour in which your changes will be displayed.
Repeat step 3 for "Deletions" and "Comments" to change the font colour for the types of edits. You can choose to keep the same colour for all three or to make them different colours.