On launching a lesson you will see a video window with voice of the teacher, and a large window showing the teacher’s desktop with real-time annotations.

It is virtually like attending a lesson in a physical classroom, where the teacher project the screen of her computer using a LCD projector onto the front of the classroom. However this is better. You can get as close as you like, and there will be no fading voice.

Beside seeing and hearing better, you can do a lot more. You can click the "Pause" button to pause the playback. Click again to continue. You can also click the "Expand" button to view a higher resolution (VCD resolution) video of the teacher. This is especially useful when the teacher is demonstrating some concepts.

Click on the "Nav" tab on the top right hand corner. You will be brought to this navigation page.

Note that the status "rls-0:1:49" refers to the elapsed time of from the beginning of the lesson. On this page you will see many thumbnail images of the teacher's computer screen at various elapsed times of the lesson. These are the hr:min:sec sets of number below each thumbnail. Double click on any of the thumbnail will bring you directly to that part of the lesson. You can therefore hop back and forth anytime during the lesson allowing you to relisten difficult parts of the lesson, or skip over easy parts.

You can also navigate by dragging the slider bar to any elapsed time of the lesson and then click on the "jump" button. Likewise, you will be brought to that part of the lesson.