The changes package, distributed with TeX Live, allows the user to manually markup changes of text, such as additions, deletions, or replacements. This example customizes the package to show author annotations with avatars. (Here's a more conventional example without the avatars. )
This is a simple resume theme I made for quick and easy submission to most job sites. It incorporates simple, clean lines drawn only with text characters to make it compatible with all PDF readers and it is designed to be easily scrapable by ATS programs. It uses only the CM Bright font and >tabularx, so it is easily modifiable with clearly defined sections for drawing separators.