
1. Set the overlay on/off hotkey in the Hotkey tab of the software settings window.
2. Enter the game and select Windowed Fullscreen Mode in the Video Options.
3. Bring up the overlay using the hotkey you set.
Source: Steam Community (opens in a new tab)

1. Set the overlay on/off hotkey in the Hotkey tab of the software settings window.
2. Enter the game and select Windowed Fullscreen Mode in the Video Options.
3. Bring up the overlay using the hotkey you set.