# Project Settings for Multi Display Mode This section describes the project settings relating to Multi Display Mode. ## Prerequisites - Have completed the setup of the Spatial Reality Display (see [Setup Spatial Reality Display Settings](/Products/Developer-Spatial-Reality-display/en/develop/Setup/SetupSRRuntime.html)). - Have the Spatial Reality Display Plugin imported to your Unity project (see [Set up for Unity](/Products/Developer-Spatial-Reality-display/en/develop/Unity/Setup.html)). ## Multi Display Settings After importing the Spatial Reality Display Plugin to your Unity project, open **Edit > Project Settings... > Spatial Reality Display**, and set the following in **Multi Display Settings**.  ### Multi Display Mode Select whether to output to multiple or to a single Spatial Reality Display. - **Single Display / Duplicated Output** Select this mode for applications using a single Spatial Reality Display. If Duplicated Output is selected in Spatial Reality Display Settings, the application will be displayed simultaneously to all Spatial Reality Displays you have set up.  - **Vertical Multi Display** Select this mode to create portrait-oriented applications that uses the Spatial Reality Displays arranged verically.  - **Horizontal Multi Display** Select this mode to create landscape-oriented applications that uses the Spatial Reality Displays arranged horizontally.  - **Grid Multi Display** Select this mode to create applications that are suitable for a large screen that use the Spatial Reality Displays arranged in a 2 by 2 grid pattern.  :::note - If different settings are set in the Spatial Reality Display Settings and the Unity project settings, the Multi Display Mode selected in the project settings is given priority. - Note that [Wallmount mode](/Products/Developer-Spatial-Reality-display/en/develop/Unity/SRDManagerPrefab.html#:~:text=Is%20Wallmount%20Mode) will always be enabled when **Vertical Multi Display** or **Grid Multi Display** is selected. ::: ### Number Of Displays Specify the number of Spatial Reality Displays you want to use with the application. - Cannot be set for **Single Display / Duplicated Output**. The number of Spatial Reality Displays used will depend on the setting in Spatial Reality Display Settings; for Single Display it will be one Spatial Reality Display, and for Duplicated Output it will be all Spatial Reality Displays that have been set up. - Up to 4 Spatial Reality Displays can be specified for **Vertical Multi Display**. - Up to 3 Spatial Reality Displays can be specified for **Horizontal Multi Display**. - Cannot be set for **Grid Multi Display**. Fixed to 4 Spatial Reality Displays in total, two vertically and two horizontally. ### Position Change Time (sec) The [SRDisplay GameView](/Products/Developer-Spatial-Reality-display/en/develop/Unity/PlayMode.html#link_3) can only be displayed on one Spatial Reality Display at a time. To counter this limitation, when running an application in Unity Editor's [PlayMode](/Products/Developer-Spatial-Reality-display/en/develop/Unity/PlayMode.html), the [SRDisplay GameView](/Products/Developer-Spatial-Reality-display/en/develop/Unity/PlayMode.html#link_3) will switch between the different Multi Display screen positions at regular intervals. This setting allows you to specify this time interval. - This setting is only used during development inside the Unity editor and does not affect the behavior of the built application. - This cannot be set for **Single Display / Duplicated Output**. ## Notes on Multi Display Mode Settings - [RunWithout mode](/Products/Developer-Spatial-Reality-display/en/develop/Unity/WithoutDevice.html) and Multi Display Mode cannot be used at the same time. If **Run Without Spatial Reality Display** 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**.