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# Representing the Timeline

The sequence of shots in a cut file is referred to as the timeline. Lustre has two visual ways of representing the timeline: the Storyboard and the multi-layer timeline.

When there is only one layer in the timeline, the Storyboard is simply the thumbnail view of the sequence of shots in the cut. When there are multiple layers in the timeline, the Storyboard is the thumbnail view of the flattened timeline, taking into consideration shots in a cut that represents a single-layer view of the timeline (see Top Vertical Priority). This single layer corresponds with one of the following, depending on the soloing and muting status:

- The active layer of the multi-layer timeline, where either the active layer is soloed or the remaining layers are muted
- The default (flattened) view of the multi-layer timeline, where soloing is disabled

The multi-layer timeline organizes the cut into a multiple layer format. The elements appear as a series of rectangles on a time-proportional grid, with a positioner at the location of the current frame. Multiple layers are useful for grade versioning, roughing out edit sequences, and for multi-layer editing. This allows you to try various edits and colour grading versions on your shots before choosing the one which is used in the final master.

For more information about:

- The Storyboard, see Editing with the Storyboard.
- The multi-layer timeline, see Multi-Layer Timeline.
- Solo mode, see Solo Mode.
- Mute mode, see Muted Layers.