You can trim regions to lengthen or shorten them. You can also trim the length of regions in the inspector. Trimming a region produces different results, depending on the region type:
MIDI regions: Lengthening a MIDI region adds silence in the lengthened area of the region. Any notes in the shortened part of the region are muted, but not deleted, and will play again if the region is re-lengthened.
Audio regions: Audio regions can be lengthened to the duration (length) of the original audio file.
Session Player region: If a Session Player region contains fills, the fills always occur at the end of the region, and so are controlled by the location of the right edge of the region.
Pattern regions: Lengthening or shortening a pattern region affects how much of the pattern plays. See Change the musical length of a pattern for detailed information.
You can trim multiple regions by selecting the regions, then trimming one of the selected regions. All regions are trimmed by the same amount (observing the differences between different region types).
In Logic Pro, tap the Trim button in the Tracks area menu bar.
Tap a region to select it.
Drag the trim handle on either the left or right edge of the region to trim the region start or region end.
If you touch and hold the trim handle before dragging it, the Tracks area zooms horizontally to allow you to trim more precisely.
In Logic Pro, select a region.
Tap the region, tap Trim, then tap Set Region Start to Bar.
The left edge of the region moves to the beginning of the bar.
In Logic Pro, select a region.
Tap the region, tap Trim, then tap Trim End to Next Region.
The right edge of the region moves to the start of following region.
In Logic Pro, select a region.
Tap the region, tap Trim, then tap Trim to Fill within Locators.
The edges of the region extend to fill the length of the cycle area.
In Logic Pro, select a region.
Tap the region, tap Trim, then tap Crop Outside Locators.
The edges of the region are cropped to the edges of the cycle area.
In Logic Pro, select the region.
Tap the Inspector button to open the inspector.
Tap the Details disclosure triangle if needed to show Details region parameters.
In the Details section are Position and Length values that determine the start point and length of the selected region.
To edit the region length, do one of the following:
Drag the Length values up or down to edit them.
Tap the Length value, then edit the value in the numeric input dialog using the Decrement/Increment buttons, the scroll wheel, or the numeric keypad.