Tags
To change the duration of a transition, highlight the transition and then right click on the transition (or Ctrl+Left mouse click) to bring out a dropdown menu for transitions.
The clock for timeline (in the centre of the middle ribbon) will change to blue with an icon similar to a film clip on the right. The number is the duration. As you may know the clock has four numbers, Hours, Minutes, Seconds and Frame Number.
In the above it means the transition is 2 sec and 24 frames long. To change the numbers, you can just type when the numbers are in blue. Press the Enter key on keyboard when it is done. Use Backspace to make any corrections.
The keyboard shortcut to change the duration is Ctrl-D.