Play - click to start presentation or restart after Pause
Pause - use to stop in middle. USE THIS if you want to continue from where you left off.
Stop - This stops the audio AND GOES BACK TO THE BEGINNING.
Back - Click to move back (finer control than slider)
Slider - Click and drag the slider to the left or right to move back or forward quickly in the presentation.
Forward - click to move forward (finer control than slider)
Volume - click to adjust volume; a volume slider will pop up; there is also a mute button

This is the status bar:

which consists of the following:


This gives messages about what is going on e.g. connecting, buffering, network congestion, etc.


This network congestion light is yellow or red when there is difficulty getting the presentation over the network. If the sound stops while this happens, wait; the program will continue to store downloaded audio and resume play (from the place it stopped) when it has collected enough.


This indicates elapsed time/total time for presentation in terms of hours:minutes:seconds.tenths of a second. You can use this to go to particular parts of the presentation.
For example, if you want to go to the audio corresponding to a particular slide, pause, find the slide from the slide list, (via the ! button), note the corresponding time listed there, and use the position slider and forward and back controls while looking at the elapsed time until you are close.
Then click the play button and the presentation will play from that point.