You must first select a Kinematic-Chain in the Kinematics-Tree.

1.Click the Kinematics-Tree in the Element-Explorer

2.Click the Kinematic-Chain whose Power Source you want to specify

The color of the Kinematic-Chain  should now be  blue .

When the color of the Kinematic-Chain  is  blue , you can use three different methods to open the Configure Power Source dialog:

       METHOD 1 : Forces toolbar / menu

       METHOD 2 : Shortcut menu

Configure Power Source from Kinematics-Tree

1.Right-click the  Kinematic-Chain  2.Click Configure Power Source in the shortcut menu

       METHOD 3 : Key combination