When looking at a specific clip in the Viewer, whether a master or sub-clip, you can set a marker point simply by pressing M. When you do this a small green icon comes up in the time track in the Canvas, notifying you that this is where the marker has been set. The same is true when setting a market in the Timeline, where pressing M will put the green marker icon in the time ruler that is at the top of the Timeline. If you want to use a marker on a specific video, audio, or photo clip in the Timeline you highlight the desired clip, put the playback bar on the correct location, and again press M. Another way to set markers is to place the playback bar in the Timeline, or at the location within a clip that you would like to mark, and then go to Mark on the task bar. Go to the Markers option, and select Add.