Set a hotkey to show/hide the display:
1. Open Simhub and go to Settings>Plugins. Tick 'Controllers input' if you're using a wheel/button box to toggle the display. Or if you want you can use your keyboard by selecting 'Keyboard input'.
2. Then go to Dash Studio>Settings and find 'Show next dash screen', click to configure.
3. Assign the button you want to use to toggle the display and click save.