To add a review point / issue
1. Select the flag icon.
2. In the pop-up, you may choose the type of issue to raise by clicking the bottom left corner.
3. All review points can be reviewed by pressing the Issues button.
4. Select from the drop-down list provided.
5. Once the issue or review point is raised, it will display like this.
6. When clicking on the issue, the following information will show and the issue can be replied to, resolved or cleared when needed.
To review and clear an outstanding issue or review point
See here