Infinite Campus has numerous help pages. If you do not understand how to do something please follow these steps.
1. Click on the help icon in the top right
2. Search what you need help with
3. Browse the various help pages they have until you find what you need. Note that some are videos what others are just articles and that it shows the path in the description. (Grading & Standards > Grading & Standards Reports > Report Card underneath the first video)