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In the Process Definition window, select the desired view under Views.
Right-click a part, then select Show Handles from the menu. (Use Ctrl+click to select multiple parts.)
Position the cursor at the intersection point of the 3D axes, then drag the part away from the assembly to a blank area of the window.
Use the handles to rotate the part.
Select the following link to view a video and see how handles allow you to rotate a part.To restore the part to the assembly, right-click the part, then select Reset Model from the menu.