Next, let's see how to insert a period of silence into an audio clip.
Click the Options tab.
Click the Edit Audio button.
The Slide Audio dialog box opens. Depending on how long the slide's audio file is, you may need to zoom out to see the waveform better.
Place the playhead where you want to insert silence.
Click the Click Insert Silence button.
Specify how much silence to insert.
Click OK.
Click Save.
Click Close.
The audio file is saved, and there's now an extra second of silence added. The name of the audio file is also changed in the library, to indicate that it's been edited.