Note: This update is for the Steam Deck Beta and Preview channels, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel.
Desktop Mode
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Fixed Steam overlay background and notifications sometimes not displaying or displaying at the wrong location or size.
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Fixed context menus sometimes opening at the wrong size.
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Dynamically update the UI's scaling factor when the system scaling setting changes.
Source: https://store.steampowered.com/news/app ... 7154536352