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Lesson 13. Markers and Navigation > Using Relative Markers

Using Relative Markers

If you want navigation controls to display the previous screen or the next screen in a series, it is best to use relative markers. As you know, when you play a movie, the playback head moves left to right across the score, and markers can appear anywhere in the score. So far, you've been referring to markers by their names (as in go to frame "Priv"). However, you can also refer to a marker by its position relative to the playback head. To identify a marker without using its name, you use a numbering scheme.

As the playback head moves, marker(0) is the marker in the current frame or the marker the playback head has most recently passed. The first marker to the right of marker(0) is marker(1), and so on; the first marker to the left of marker(0) is marker(−1), and so on. These markers are numbered relative to the position of the playback head, and they always refer to a destination based on the current position of the playback head, not to a destination in a specific frame.


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