To Edit an Initial Condition
1. To edit an initial condition, right-click it on the Mechanism Tree and then choose 
from the shortcut menu. The Initial Condition Definition dialog box opens.
from the shortcut menu. The Initial Condition Definition dialog box opens.2. Select a velocity initial condition in the list box. The corresponding reference entities are highlighted on the rigid body.
3. Add or remove a velocity initial condition or change any of the following items:
◦ Snapshot
◦ Magnitude
◦ Direction
4. Clear the check box to the left of the velocity condition to disable a condition.
5. Click OK to save the modified initial condition specifications.
6. To revert to the previously saved initial conditions definition, click Cancel.