If you are not using Kaizena (formerly Voice Comments) to provide feedback to your students via GAFE. My students truly appreciate the audio along with the highlights pointing out the improvements.
As a side note, be careful highlighting different locations as you record. When you go to highlight additional areas the audio recording will start over again.
"A teacher was having her students work on an ongoing project where the students would save multiple documents to a folder in Google Drive. To make this process easier, I wrote a Google Apps Script file to automatically create and share the folders with the students."