You will want to install a custom launcher (home screen) since the default will likely not work well in portrait mode.
We recommend using Nova Launcher. Follow their instructions to install.
Display rotation
In Settings->Display->Screen rotation, there may be settings for rotation. Select the logical option. Often this is "Original", "Auto", or "Force Portrait".
Android normally uses the motion sensor to set orientation. Your box doesn't have one, so we use an App to set it instead!
If the combination of the Settings menu and the Set Orientation app do NOT get you a portrait mode, you should return that box and get different model.
Software requirements and settings (Pi / Linux)
Touchscreen bezel: This acts as a mouse in Chrome and allows interaction with your SplashTiles Screen. Just plug into the Pi via USB.
You will need a keyboard to setup. Wireless keyboards are recommended. Leave the wireless dongle attached to the Pi in case you need it later.
Display rotation: Use the Portrait setting described in the above instructions
Vertical Screen design considerations
Your SplashTiles screen will automatically be sized for your vertically mounted TV. However, since the physical screen aspect ratio is different please consider these tips when designing your screens.
Consider increasing the font size if the tv will be viewed from a distance
You should create screens while using a vertical aspect ratio window size (on the PC). This helps with understanding how the screen will look in portrait mode.
If using a touch bezel, your SplashTiles screens are interactive! Consider using this for quick select buttons or home automation controls.
Many tiles have the option to set as Interactive. Select this on your vertical format Screens
WebGL apps and 3D models are great choices for interactive big screens!
In the SplashTiles app, you can swipe from the screen edges for control