I am now inside my game. How do I show the XSplit Gamecaster overlay?
When XSplit Gamecaster loads into your game, you will see a notification that tells you what hotkey is set to open the overlay. The default hotkey is [Ctrl]+[Tab]:
If you want to change the default hotkey, go to the Settings Tab of the XSplit Gamecaster window and scroll down until you get to the Hotkeys section then click on the grey bar next to the Overlay row and set a new hotkey by using a single or combination of keys: