
Change loop settings for Live Loops cells in Logic Pro for Mac
When you select a cell, you can change the loop settings in the Cell inspector. You can create interesting variations by changing the following settings:
Start: Determines the initial starting position of the cell. By default, this is the same as the Loop Start setting, but you can change it so the cell starts at a different place initially than when it loops. This setting is ignored if the Play From setting is set to a value other than Start, or if the Quantize Loop Start position is set to On.
Loop Start: Determines the position in the cell where the loop starts after the initial start and playback of the cell. For example, if you have a cell containing a four-bar piece of musical material, you can change the Start setting so the loop initially starts at the first bar, then plays from the third bar on each time it loops.
Loop Length: Determines the length of the loop. Changing the Loop Length value can be useful when you want to loop only a particular portion of a cell.
Cell Length: Determines the overall length of the cell. This can be longer than the amount of musical material contained in the cell. When the Loop checkbox is deselected, the cell plays to the end of the cell length, then stops.

You can also change these settings graphically for audio and MIDI cells in the Cell Editor.