Snap Automation Mode: Bar — Logic Pro keyboard command of the day

  Snap Automation Mode: Bar

Sets snap automation to the bar. When adding or moving automation points they will snap to the nearest bar.

Snap items to the grid in Logic Pro — Apple Support

The Tracks area includes a grid that helps you align regions, automation points, and other items with the time divisions in the ruler. When you perform any of the following actions, the items move according to the current Snap value: