My garmin does not pick up when I walk or do any exercise unless I track it. Is there settings I can change?

I have switched from fitbit to garmin. When I did any exercise wearing the fitbit it would track it automatically. For example when I played a game of football I didn't have to tell my watch I was playing it automatically picked it up. Dies the garmin do this if so what setting do I need to change? As I do not always remember to track when I start a walk or game