In the course designer, click on the lesson or an assignment you want to change and add (or delete) the necessary information.
If you need to add a lesson or an assignment, click on the corresponding button.
The icons on the left in the course designer next to a lesson/assignment title indicate the status of the lesson or the assignment:
1) No icon: lesson/assignment is published.
2) Clock icon: unpublished changes.
3) Crossed-out cloud icon: this lesson/assignment has not been published.
If you don't want your changes to be published immediately, you just leave everything as it is until you decide to publish.
If you want the students to see the new version of the course, you need to publish all changes in the lessons by clicking on the "Publish changes" button.
And publish new lessons and assignments by clicking on the "Publish" button in the lesson title.
