Show the remaining time to solve a specific task on the screen with a colour circle
A sound will ring as soon as time is up.
Press the cursor button in the toolbar to control the tool.
Set the timer by using the '+' and '-' buttons. If you click on the play button (white triangular button), the timer will start counting down, the '+' and '-' disappear and the play button becomes a pause button (button with two white stripes). You can press this to pause the timer.
You can reset the timer by clicking the button in the upper left corner of the screen.