Which feature in Pro Tools allows for the precise arrangement of MIDI note timing?

Grid Mode is a feature in Pro Tools that enables precise timing and placement of MIDI notes, ensuring that they align perfectly with a specified rhythmic grid. When Grid Mode is activated, any movement of MIDI notes will snap to the nearest grid interval, which can be set to various note values such as quarter notes, eighth notes, or sixteenth notes. This is particularly useful for achieving a tight and organized arrangement in MIDI compositions, as it simplifies the process of quantizing performances and ensuring that everything is rhythmically cohesive.

In contrast, Slip Mode allows notes to be moved freely without snapping to a grid, making it less suitable for precise arrangements when timing is critical. Shuffle Mode affects the relative positioning of MIDI notes by moving them closer together when notes are deleted or repositioned, which can disrupt a carefully planned arrangement. Spot Mode allows notes to be placed at specific locations defined by a time or measure, which provides accuracy but does not allow for real-time adjustments and timing refinements in the same manner as Grid Mode. Therefore, Grid Mode is the ideal choice for arranging MIDI note timing accurately within Pro Tools.