Exam 77-883: Microsoft PowerPoint 2010 3. Working with Graphical and Multimedia Elements 3.5. Edit video and audio content: Trim Video Video Tools ->Playback->Editing->Trim Video Playback: Trim Video Say you wanted to begin the video when the camera is steady. You can edit the beginning with the Trim function. Trim doesn't delete any of the video. It simply sets the start and stop times.   3. Try it: Reset Design The Video on Slide 4 is still selected. Go to Video Tools ->Editing->Playback. Click on Trim Video.   You will be prompted to enter the Start Time and the End Time. You can use the playback buttons to set the time very precisely if you wish.   Click OK and keep going, please.