Quantize 1/8 Triplet (1/12) – Logic Pro keyboard command of the day

  Quantize 1/8 Triplet (1/12)

Sets the quantization value to an eighth-note triplet (one twelfth of a 4/4 bar).

Quantize regions in Logic Pro – Apple Support

The Quantize parameter in the Region inspector applies to whole regions. If you want different parts of a region to have different Quantize values, you can split the region, apply different quantize settings to different segments, and then join them using the Join command or the Glue tool.