# Project Settings for Multi Display Mode This page describes the items in the Spatial Reality Display project settings related to the Multi Display Settings.  ## Multi Display Mode Select whether to output to multiple or to a single Spatial Reality Display. If different settings are set in the Spatial Reality Display Settings and the Unreal Engine project settings, the Multi Display Mode selected in the project settings is given priority. - Single Display / Duplicated Output\ Select this mode for applications using a single Spatial Reality Display or displaying the same content to multiple Spatial Reality Displays simultaneously. - Vertical Multi Display\ Select this mode for applications using the Spatial Reality Displays arranged vertically.\ This will change the appearance of the SRDisplayManager GIZMO displayed in the level.\ Note that [Wall mount mode](/Products/Developer-Spatial-Reality-display/en/develop/UnrealEngine/SRDisplayManagerActor.html#link_2) will always be enabled when Vertical Multi Display is selected.  - Horizontal Multi Display\ Select this mode for applications using the Spatial Reality Displays arranged horizontally.\ This will change the appearance of the SRDisplayManager GIZMO displayed in the level.  ## Using Display Set the number of Spatial Reality Display used by the application. - This value cannot be set for Single Display / Duplicated Output mode.\ The number of displays used by the application will depend on the setting inside the Spatial Reality Display Settings (a single Spatial Reality Display when Single Display is selected, all connected Spatial Reality Displays when Duplicated Output is selected). - For Vertical Multi Display mode, you can choose either two or three devices. - For Horizontal Multi Display mode, you can choose either two or three devices. The appearance of the SRDisplayManager GIZMO displayed in the level will change according to this number. ## Changing Time(sec) The Unreal Engine VR Preview does not support displaying to multiple Spatial Reality Displays simultaneously.\ Therefore, when running VR Preview inside the editor, the SRDisplayManager will switch between the Multi Display positions periodically, allowing you to check the different viewing angles on a single Spatial Reality Display.\ This setting allows you to set the time interval between position switches.\ This setting is only used during development inside the Unreal Engine editor and does not affect the behavior of the built application.\ This value cannot be set for Single Display / Duplicated Output mode. ## Notes on Multi Display Mode - Run Without SRDisplay Mode and Multi Display Settings cannot be used at the same time.\ If Run Without SRDisplay Mode is active, the Multi Display Settings will be disabled. - Multi Display Mode is only available for ELF-SR2.\ If you are creating an application that is also meant to run on ELF-SR1, select Single Display / Duplicated Output for Multi Display Mode.