A method and an apparatus for authoring stereoscopic 3D video information comprising a 3D video stream and 3D overlay graphics are described. A depth range in z-space for the stereoscopic presentation of the 3D video stream is determined for a plurality of time codes. A reference plane in z-space for placing the 3D overlay graphics is then determined such that depth conflicts between the 3D video and the reference place are reduced. A comfort zone surrounding a display screen plane and comprising the reference plane is defined, wherein the comfort zone specifies a depth range in z-space for preferable presentation of the stereoscopic 3D video information. It is then determined whether a depth conflict between the reference plane and the 3D video stream remains for the respective time codes and/or whether a depth conflict exists between the comfort zone and the 3D overlay graphics for the respective time codes. In this way a set of conflict intervals is generated, which is stored on a media source comprising the 3D video stream and the 3D overlay graphics. The set of conflict intervals is used during playback to adapt a presentation of the 3D video stream or a presentation of the 3D overlay graphics.