In CATIA, you can save the pose of a virtual object as a library by the following steps:

1. Open the CATIA software and select the "Human Modeling" tool in the "Digital Modeling" workspace.

2. In the "Human Modeling" toolbar, select "Human Pose Library Manager".

3. In the pop-up window "Body Posture Library Manager", click "New Library" to create a new posture library.

4. Click the "New Posture" button in the new Posture Library to create a new pose.

5. In the posture editing interface, use control points or other tools to adjust the posture of the dummy.

6. After adjustment, click the "Save Posture" button to save the Posture to the Posture Library.

7. By repeating the above steps, multiple postures can be saved in the same posture library.

8. When you need to apply the saved posture, you can open the posture library manager, select the required posture, and then apply it to the virtual model in the CATIA document.