---
title: Display Mode Optional Properties
framework: coregraphics
role: collectionGroup
role_heading: API Collection
path: coregraphics/display-mode-optional-properties
---

# Display Mode Optional Properties

Keys for optional properties in a display mode dictionary.

## Overview

Overview A given key is present in a display mode dictionary only if the property applies, and is always associated with a value of kCFBooleanTrue. Keys not relevant to a particular display mode will not appear in the mode dictionary. Special Considerations Starting in OS X v10.6, display mode dictionaries have been made obsolete by the display mode opaque type. For more information on display modes, seeChanging Display Modes (OS X v10.6 or later).

## Topics

### Constants

- [kCGDisplayModeIsSafeForHardware](coregraphics/kcgdisplaymodeissafeforhardware.md)
- [kCGDisplayModeIsInterlaced](coregraphics/kcgdisplaymodeisinterlaced.md)
- [kCGDisplayModeIsStretched](coregraphics/kcgdisplaymodeisstretched.md)
- [kCGDisplayModeIsTelevisionOutput](coregraphics/kcgdisplaymodeistelevisionoutput.md)

## See Also

### Constants

- [CGCaptureOptions](coregraphics/cgcaptureoptions.md)
- [CGDisplayChangeSummaryFlags](coregraphics/cgdisplaychangesummaryflags.md)
- [CGConfigureOption](coregraphics/cgconfigureoption.md)
- [Display Fade Blend Fractions](coregraphics/display-fade-blend-fractions.md)
- [Display Fade Constants](coregraphics/display-fade-constants.md)
- [Display ID Defaults](coregraphics/display-id-defaults.md)
- [Display Mode Standard Properties](coregraphics/display-mode-standard-properties.md)
- [Reserved Window Levels](coregraphics/reserved-window-levels.md)
- [CGScreenUpdateOperation](coregraphics/cgscreenupdateoperation.md)
- [CGWindowLevelKey](coregraphics/cgwindowlevelkey.md)
- [Window Server Session Properties](coregraphics/window-server-session-properties.md)
- [CGDisplayStreamUpdateRectType](coregraphics/cgdisplaystreamupdaterecttype.md)
- [CGDisplayStreamFrameStatus](coregraphics/cgdisplaystreamframestatus.md)
- [Display Stream Optional Property Keys](coregraphics/display-stream-optional-property-keys.md)
- [Display Stream YCbCr to RGB conversion Matrix Options](coregraphics/display-stream-ycbcr-to-rgb-conversion-matrix-options.md)