If you want to time a writing session go to Tools > Sprint Timer...
Sprint Timer opens two types of clock for timing a writing session. This feature may also be accessed by clicking the timer icon in the bottom-right toolbar:
Countdown mode: Counts down a user-set number of minutes. The default time for a writing sprint is 25 minutes but this number may be highlighted and the desired number of minutes entered. The minimum number of minutes is 1 and the maximum number is 999.
When the desired number of minutes has been typed in or if the 25-minute writing sprint is acceptable, press Start Sprint to begin the countdown.
Stopwatch mode: Times the writing session up from 00:00:00 (zero hours, zero minutes and zero seconds).
Click away from the Sprint Timer to hide it; click the icon to display it. Hiding it does not stop the clock.
At any point in the writing sprint, either clock may be stopped temporarily by clicking the Sprint Timer icon and pressing the Pause button. When the Pause button is pressed, the button converts to the Resume button. Press the Resume button to restart the clock from the point at which it was paused.
At any point in the writing sprint, the countdown or stopwatch may be cancelled by clicking the Sprint Timer icon and pressing the End Sprint button. If the Sprint Timer is in Countdown mode, the default number of 25 minutes will be restored.
In Countdown mode, when the set time has elapsed, the Sprint Timer will pop up and present the user with the option to begin another writing sprint (the Reset button) or open the computer's default web browser to their X page (the X button), where the user can post to X about their writing progress to followers.
Show Stats
When this section of the Sprint Timer window is expanded, information about the current writing session is displayed:
Click the down-pointing arrow next to Hide Stats to collapse this section of the window.
Click the graph icon at the bottom right to open the Writing Stats panel.
To learn more about "writing sprints" and tracking your productivity read the following: