# 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**.