Use incremental snapping to move, rotate, or scale GameObjects by precise, discrete values.
To move, rotate, or scale by increment snap values when incremental snapping is not enabled, hold down Control (macOS: Command) while you use one of the transform gizmos in the Scene view.
To enable incremental snapping for the Move tool, select Toggle incremental Grid snapping in the Grid and Snap overlay. To control the snap distance, set a value for Incremental snapping size.
To enable incremental snapping for the Rotate tool, select Toggle angle snapping in the Grid and Snap overlay. To control the rotation snapping, set a value for Incremental angle snap size.
To enable incremental snapping for the Scale tool, select Toggle scale snapping in the Grid and Snap overlay. To control the scale snapping, set a value for Scale snap multiplier.