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# Why can I no longer start the timer in the Desktop app?

All official Toggl Track apps (web, desktop and mobile) have two modes for entering time:

* **Timer mode** where you start and stop the timer.
* **Manual mode** where you input time for an activity that already happened.

In the Desktop apps, you can switch between the two modes by hitting ⌘ + D / CTRL + D on the keyboard or by going to:

* Toggl Track (in the main menu) -> Switch Mode on **macOS**.
* Cogwheel icon -> Use manual mode on **Windows**.

**If you're unable to start the timer and are stuck with only being able to add duration, hit ⌘ + D or CTRL + D and you'll go back to the normal/timer mode.**