To ease the collaborating between shared users and the sender it is possible to write comments on the shared files, even on specific time codes. By pressing the "+" icon the letter “alt+i” you can type in commends and press the "send" bottom and all users that have access to the link will then get an e-mail with the commend you made and a link to the file. You can then see all users commend and make a reply, even on cell phones and tablets. Use the "Enter" button to create more lines and then use "Shift+Enter" to send.
Press this icon to mark in the time code.
All the same, features are of cause possible to do from insight your ioGates account under the "file info" menu.