Samsung Q30 - Manual (Page 115)

7-22 Manual
Q7 When I pressed + keys while playing a game,
the computer does not operate properly.
A Do not press + keys while playing a game, since it may cause
a system error.
Q8 When I played 'The Sims: House Party' game in Dual Display
Clone mode, a mouse afterimage is displayed.
A1 Press +< > to change the display setting to Dual Display mode, then
play the game.
A2 If above method does not solve the problem, change the setting to display only
on the LCD.