Record narration in Powerpoint 2013 with returns to previous slides

Hi,

I am trying to record narration on a Powerpoint slide show  (Powerpoint 2013). However I discovered that I can go only forward with slides. When I return to a previous slide the audio simply overwrites the narration of the first visit to the slide. I s there any way to have Powerpoint store multiple audio segments and the timing on returning to previous slides ?

Thanks