Configuring a Typing Break automatically locks the keyboard after a specific time interval. Use the Keyboard Preferences tool to configure the time interval of the break. To open the Keyboard Preferences tool, choose System → Preferences → Keyboard. Select the Typing Break tab to access the Typing Break options.
Lock screen to enforce typing break – Determines whether a break is enabled. To enable a typing break, this option must be selected.
Work interval lasts – Specifies the duration during which the keyboard is active.
Break interval lasts – Specifies the duration of the lock for the keyboard. After the interval, the keyboard is unlocked automatically.
Allow postponing of breaks – Determines whether the break can be postponed for a brief duration.