To start adding video to the timeline make sure the Video 1A track is selected in the Timeline window. It should appear in bold type, if it is not in bold type click on it. Make sure no audio tracks are in bold. If so click on that audio track to deselect it

Drag the blue current position marker in the timeline window back to the beginning of the timeline and press I on the keyboard or click the right hand bracket on the program monitor to set the point where the source material will begin.

Drag a demo clip from the project window to the source monitor.

Play the clip or drag the current location marker to the point where you want the clip to begin. Mark the in-point by clicking on the left hand bracket or pressing I on the keyboard. Play the clip or drag the current location marker to the point where you want the clip to end. Mark the out-point by clicking on the right hand bracket or pressing O on the keyboard. Then click on the Overlay button in the lower left corner of the Source Monitor.

You should now see a video clip at the beginning of your timeline on track 1A. Drag the blue current position marker back to the top of the timeline and press the spacebar to play back the edit.

Continue to edit clips to the timeline. Find the next in-point on the timeline and mark it as indicated above. Load the next source clip.etc…..