NSIsNotNil NSNegateBoolean NSNegateBoolean NSNegateBoolean NSNegateBoolean NSNegateBoolean NSNegateBoolean NSNegateBoolean None - Force pixel aspect ratio to 1:1. Loose - Align dimensions to chosen 'Alignment' value and pick pixel aspect ratio that preserves the original display aspect ratio. Automatic - Use a pixel aspect ratio that maximizes storage resolution while preserving the original display aspect ratio. NSNegateBoolean NSNegateBoolean NSIsNil NSNegateBoolean NSNegateBoolean NSNegateBoolean NSNegateBoolean 0 NSNegateBoolean 0 NSNegateBoolean NSNegateBoolean 0 NSNegateBoolean NSNegateBoolean 0 NSIsNil