Abstract: A computer-implemented method for annotating a 3D modeled object representing a CAD mechanical part or assembly of parts, two or more views of the 3D modeled object being displayed and at least one of the views being compliant with a view of a technical drawing. The method includes obtaining a 3D scene and displaying an orientation-free view of the 3D modeled object, at least one fixed view of the 3D modeled object. The method also includes creating, upon user action, an annotation by selecting at least one geometrical element on at least one of the views of the 3D modeled object and an annotation type. The method further includes displaying the created annotation on at least the orientation-free view.