To play content at variable speeds

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Play content.
On the View menu, point to Enhancements, and then click Play Speed Settings.
In the Enhancements pane, move the Play Speed slider to the speed at which you want to play the content, or click the Slow or Fast links.

Note Image Notes

Not all content can be played at variable speeds.
To play content in reverse, select a play speed less than 0.
To maintain audio and video fidelity when playing content slower or faster than normal, select play speeds between 0.5 and 2.0. This feature, known as time expansion and time compression, is only supported for files with the extensions .wma, .wmv, .wm, .mp3, or .asf. In addition, it may not be available when playing streaming or progressively downloaded media.
To select speeds between the play speed marks, clear the Snap slider to common speeds check box.
The timecode indicator is only active when playing files in Windows Media Format that include Society of Motion Picture and Television Engineers (SMPTE) timecode information. The timecode indicator displays the progress of the file in hours, minutes, seconds, and frames (hh:mm:ss:ff).
This feature is only available on select versions of Windows. For more information, see Special features.