You may mark items that you want to review later. Click the button in the upper right corner labeled Mark for Review to mark an item. 
You must review items during the testing time. Items may be selected for review whether you have answered them or not.
How to Mark for Review:
Use the Mouse to move the cursor (pointer) to the Mark for Review button and then click the LEFT mouse button.
A check mark will appear when the item has been marked for review. If you wish to uncheck the item, click the Mark for Review button again and the check mark will disappear. 
When you reach the last item in the examination, press the Next button and you will be taken to the Review Screen for an opportunity to review any items marked for review or incomplete.
