How to make G & C's cumulative comments

The guidance and counsellor can make cumulative comments as shown below;

1. Click on make comments (cumulative) under guidance and counsellor.
2. Click on the class from the list of classes displayed that you wish to enter the cumulative comments.
3. Enter the comments beside the form teacher’s comment for all the students in the selected class. 
4. Scroll down and click on the save button to save the comments.