Apple Logic Pro 9 - Manual (Page 538)

This action time stretches the entire contents of the region equally, as follows:
• It compresses the audio material if you drag the region corner to the left.
• It expands the audio material if you drag the region corner to the right.
Snapping Flex Markers to Transient Markers
You can snap a flex marker’s position in one audio region to a transient marker’s position
in another audio region.
To snap a flex marker in one audio region to the transient marker in another audio
region
1 Click-hold the flex marker, and drag the mouse upward or downward over an adjacent
track.
538 Chapter 16 Flex Time Editing