In this recipe, we will see how the programming of Avid Media Composer allows you to edit Filler at the beginning of a Sequence, or anywhere between segments of video or audio. However, it does not allow you to Splice or Overwrite Filler at the end of a Sequence (don't worry, Avid gave us a way around that, and it's discussed in the recipe that follows this one).
Go to the Clip Name Menu above the Source Window.
From the Clip Name Menu select Load Filler.
By default, Media Composer gives you 2 minutes of Filler. Mark In and Mark Out for the duration you would like to edit into your sequence.
Enable the Source and Timeline Track Selectors as needed.
Splice or Overwrite the selected duration of Filler into your sequence.