The Show Grid while Cropping option will display a grid in the Viewer while you drag to adjust the cropping area. The Grid feature can be great for getting the composition just right and it is controlled by the Grid tool. The Show Grid while Cropping option will enable you to display the grid during cropping even when the general Grid visibility is turned off.
The Grid tool will determine whether the grid should follow the crop area or the entire image area with the Follow Crop option.
