Quantize 1/8 Note

Set quantization to an eighth note. Selecting a group of notes with the Quantize Tool will adjust them to eighth note positions.

Logic Pro Quantize parameter values — Apple Support

The Quantize parameter is non-destructive. It adjusts the playback positions of notes in MIDI regions when Logic Pro is in playback or record mode. The original positions are kept in the regions, so you can go back to the original timing.