In the activities view, you can create and view tasks, which is things that should be done within a Case. These Tasks can be used as a starting point for new timers when you start working on that activity.
To start a timer based on a task activity, open the Activities-view move your mouse over a task that you want to start work on, and press the white play-button.
When you click on the play-button a timer will start immediately, appearing in the left bottom corner. When you have finished your work you can click on the timer-bar to open the register time dialog, or if you temporary want to pause the timer click on the pause icon.
For more information about how the timer works please see article xxx.