You can zoom in and out from the Timeline, which changes the length of the labelled ticks running along the Timeline. You can set the ticks manually or by zooming in and out of the Timeline using your mouse wheel.

To change the Zoom level:

1. Position your cursor over the Time-track and scroll the mouse button backwards and forwards to zoom in and out of the Timeline. Notice that the tick lengths change as you do so.
2. Right-click on the Time-track and select Set Zoom Level.

   The ‘Zoom Level’ dialog is displayed.

   
   
   
3. Select one of the available tick-length options (the smaller the time value, the closer-in the zoom).
4. Click OK to save the new Zoom Level.