What feature allows users to align audio clips to beats in Pro Tools?

The feature that allows users to align audio clips to beats in Pro Tools is Grid mode. When Grid mode is activated, the edit selection and the placement of clips snap to a predefined grid based on the current grid settings (such as the tempo and time signature). This is particularly useful for precise timing and ensuring that audio clips align perfectly with the musical beat, which is crucial in production environments where timing is essential.

Nudging allows users to move clips by small increments but does not provide the same level of precise alignment with musical beats. Spot mode is used for placing clips at specific locations in the session and offers accuracy in positioning but does not inherently align them to the musical grid. Slip mode allows free movement of clips without snapping, which means it does not assist in aligning clips to the beats. Thus, Grid mode is the most effective feature for this particular task.