Clicking on the red cross will give you more detail on the problem allowing you to fix it. In the example here no medication has been added to the prescription.

Clicking on the green ticks will also give you some more information about that particular element.

When you are happy with the status of the review panel, click on the Publish button. You will be taken back to the tutorial manager screen and your new exercise will be there for you to preview

Note: You may save your exercise at any time using the save button. However, students will not be able to view the exercise until you publish it.