The Source Viewer
You'll use the Source Viewer primarily for previewing clips when you're in the Timeline view. It's a very simple interface that contains a number of useful tricks including the trimming and insertion of media clips.Once you have assembled your edit and trimmed your clips, you will probably need to trim and insert new material such as images or other media clips. You do this via the Source Viewer, where you can preview a clip, trim it by adjusting mark-in and mark-out points, and insert it into the Timeline via drag and drop or by creating a three-point or four-point edit at the Timeline cursor position.
To send a clip to the Source Viewer
Do one of the following:
- Figure 6.45 ).
Figure 6.45. The media clip selection menu.

Tool Buttons That Should Be Added to the Source ViewerThe Source Viewer is already fairly crowded, but you should add these four buttons to your interface if they are not already there. Chapter 1 contains complete details on how to add a button to any of the Liquid Edition interfaces.
![]() Used to navigate both mark-in/mark-out points and also markers. |
The Zoom tool
Once you have a clip inside the Source Viewer, you can use the Zoom tool to adjust how big the Timeline indicators are.
To use the Zoom tool
- Figure 6.46 ).
Figure 6.46. The Zoom tool in action.

- Directly to the right of the Zoom tool is a black horizontal line. This indicates how much of the clip you can currently see in the Source Viewer's Timeline. The red mark below this indicates the position of the cursor.
Scrubbing a Media ClipScrubbing is a term used to describe the timeline cursor being moved manually through each frame rather than being played back. It's primarily used to find an exact position on the Timeline for either placing a special effect or inserting a new clip.Scrubbing can be performed using either the mouse or the keyboard, or more likely, a combination of both.You can scrub the Timeline using any of the following methods: Trimming a clip in the Source ViewerYou can trim dynamically in the Timeline to adjust your clips the quick and dirty way. The more refined method is to use the Source Viewer to trim the clip. Once the clip is in the Source Viewer, your first job is to preview and look for anything that might need to be cut out from the start or the end. In fact, you might decide just to use a few seconds from the middle of the clip. You can do all of this by adding mark-in and mark-out points to the clip. To add a mark-in or mark-out point in the Source Viewer
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