Setup guide part 4.
Adjusting Steam Deck UI Scale

This guide will walk you through the process of changing the UI scale on your Steam Deck with the DeckHD screen installed. By default, the UI appears smaller than normal when the DeckHD screen is installed due to the larger resolution.

Approx. 20 mins.

Step 1.

In SteamOS, go to Settings -> System -> toggle On Enable Developer Mode

Step 2.

In the Settings menu, scroll all the way down to Developer and toggle On CEF Remote Debugging. Your Steam Deck will commence a restart.

Step 3.

Install and launch Google Chrome. There are two ways you can do this:

  • In SteamOS:
    1. Go to Library -> Non-Steam -> Learn more
    2. A popup window will appear, click the Add Chrome button
    3. Google Chrome will begin to install
  • In Desktop Mode:
    1. Launch Discover (Software Center)
    2. Search Google Chrome
    3. Click Install

Step 4.

Input the following web address in Google Chrome:

Step 7.

Resize the column to reveal the full window. Go to Local Storage -> -> AllowInternalDisplayScaling, change the Value from “null” to “true” as shown.

Step 8.

Restart your Steam Deck.

Step 9.

In SteamOS, go to Settings -> Display -> toggle off Automatically Scale User Interface, then play with the slider until you’re happy with the display size.

DeckHD is a product of FX Technology Limited.

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