> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lynxssp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Connection

When opened for the first time, the Screen App will display the Display ID which is six random characters inside a purple box. The Display ID is used for the binding process in the Lynx SSP Platform.

<img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-1.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=50d86cf8e6b5bc88ad76a79761746de0" alt="Screen App 1" width="1440" height="1024" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-1.png" />

Click on the Gear logo in the top right corner.

<img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-2.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=6ae78c7595486a0042cacd69b54905c9" alt="Screen App 2" width="1440" height="1024" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-2.png" />

You will be redirected to the Config UI as shown below. 

<img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-3.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=1fea9624965e55f734b4827ebeba96a5" alt="Screen App 3" width="1440" height="809" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-3.png" />

### Overview

1. **Device ID** is a unique string of characters taken from the MAC address of the device.
2. **Display ID** is a unique string of characters like on the main screen which will be used to bind to the inventory of the client portal.
3. Custom height and custom width function to set the height and width of the frame from the player. The numbers listed do not represent sizes in any metric.
4. **Screen** serves to select the screen (one device can run more than one screen).
5. **Custom X and Custom Y** function to set the frame distance from the top left.
6. Enable Resize if enabled, then you can adjust the size of the screen app, if turned off the screenapp size will be fixed and cannot be changed.
7. Submit serves to apply configuration changes.
8. Cancel serves to cancel configuration changes and return to the main Screen App screen.

There are several shortcuts that can be used on the Screen App as shown in the following table:

| **Shortcut** | **Description**                  |
| :----------- | :------------------------------- |
| **Alt + T**  | **Enable/Disable Always on Top** |
| **Esc**      | **Close full screen**            |
| **F**        | **Fullscreen**                   |
| **Alt + Q**  | **Close Apps**                   |

## Content Format

Screen App supports the image and video formats listed in the following table:

<CardGroup cols={2}>
  <Card title="MP4" />

  <Card title="WEBM" />

  <Card title="HTML" />

  <Card title="JPEG" />

  <Card title="JPG" />

  <Card title="GIF" />

  <Card title="PNG" />
</CardGroup>

## How to Connect using ScreenApp

<Steps>
  <Step title="Ensure you have added DOOH (Digital-Out-of-Home) Inventory on the Lynx SSP Platform">
    <Card title="How to Add DOOH (Digital-Out-of-Home) Inventory ↗" href="/documentation/inventory/dooh/add/how-to-add" />
  </Step>

  <Step title="Open ScreenApp">
    Open the Screen App application and a Screen ID will appear that you can use to connect the billboard in Lynx SSP with the Screen App application.

    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-1.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=50d86cf8e6b5bc88ad76a79761746de0" alt="How to Connect using ScreenApp 2" width="1440" height="1024" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/screen-app-1.png" />
  </Step>

  <Step title="Go to Lynx SSP Platform, Open “Screen” Tab & Click “Connect Player”">
    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-3.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=06f924150b21e931a38bc6b78fdac9b0" alt="How to Connect using ScreenApp 3" width="1920" height="984" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-3.png" />

    Then it will display the connect player modal.

    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-3.2.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=663362d261ec02c8ffef78f6bef64fa8" alt="How to Connect using ScreenApp 3.2" width="1920" height="948" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-3.2.png" />
  </Step>

  <Step title="Click the drop-down menu for connection type and Select “ScreenApp”">
    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-4.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=9e38dc1873e2e4d157b7a2489b75ee62" alt="How to Connect using ScreenApp 4" width="1920" height="983" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-4.png" />
  </Step>

  <Step title="Enter the screen ID obtained from the screen app.">
    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-5.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=f7d52e1005a931121b05b74b6a87b383" alt="How to Connect using ScreenApp 5" width="1920" height="984" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-5.png" />
  </Step>

  <Step title="Click the “Save” Button">
    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-6.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=e19607c6932890322803fab42fe62570" alt="How to Connect using ScreenApp 6" width="1920" height="984" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-6.png" />

    Then Screenapp is successfully connected.

    <img src="https://mintcdn.com/lynxssp-91a2d3cb/XyupbwYkIbgndxRU/images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-6.2.png?fit=max&auto=format&n=XyupbwYkIbgndxRU&q=85&s=bc0cc4e9bd5f45052014ab6b9633b6ba" alt="How to Connect using ScreenApp 6.2" width="1920" height="854" data-path="images/documentation/inventory/display/dooh/screens/screen-app/connection/how-to-connect-using-screen-app-6.2.png" />

    You can perform the **connection check directly at the location of your DOOH (Digital-Out-of-Home) Inventory point**. Ensure that all previous steps have been completed and bind filler content to your DOOH (Digital-Out-of-Home) Inventory ([Create a Filler Content ↗](/documentation/creative-management/filler-content/create)). If you encounter any issues while performing the connection check, you can contact the Lynx Support team.
  </Step>
</Steps>