If you find that the coordinates of the measured objects are translated relative an exterior coordinate system, you can correct this with a object model adjustment. This will change the sensor model for both images and also the object coordinates of the measured objects.
If you have measured an object in the primary image and can not get the object to fit in the secondary image, you can try a model adjustment. This will change the sensor model for the secondary image only. If the model adjustment is not sufficient you can try the slave image adjustment.
If you have started making measurements in a stereo pair and then want to combine one of the original images (the master) with a new image (the slave) to continue the measurements, you may find that the measured objects are displaced in the new image. If you select an object and drag the Z slider, you will change the object coordinates, which you probably do not want to. In addition, you may find that the objects can not be brought to coincide, due to poor interior orientation. Choose the slave image adjustements to fix this situation. This will change the sensor parameters of the slave image only.