Once a curriculum is assembled and you wish to only hightlight or show a subset of courses within the curriculum, you can use the highlighting function.
The highlighting function is located underneath the four analysis options in the side bar menu on the left.
The highlighting function is activated when activating the toggling switch 
.
You may then select any numnber of individual course units by clicking on them in the curriculum view. Clicking on the same course unit twice, unselects the course. The selected courses are hightlighted by a small green box around it.
You now have two options to highlight the selection of courses.
The unselected courses can be hidden.
Click on 
to grey out all unselected course units:
to hide all unselected courses:
To reset the selection of course units, click on 
. If the selection was on when resetting, you have to uncheck that box, so that all courses re-appear.
Highlighting can be used in combination with all other analyses in CIT.
NOTE: Clusters can also be selected for highlighting. The course units within a cluster have to be separately selected if they should also be highlighted. However, if a course unit within a cluster is selected, then the cluster containing that course unit will be auto-selected along with the course unit.