You may flag items that you want to review later. Click the button in the upper right corner labeled Flag 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 Flag for Review:
Use the Mouse to move the cursor (pointer) to the Flag for Review button and then click the LEFT mouse button. A flag indicator will appear when the item has been flagged for review.
If you wish to unflag the item, click the Flag for Review button again and the flag indicator 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 flagged for review or incomplete.
