A method for adapting an overlaid image displayed on a monitor located in a cab of a vehicle including: defining a location on an embedded element of a vehicle side as a target on a captured image; processing the captured image by tracking the target position and by tracking at least one recognizable pattern linked to a horizontal dimension on the captured image; displaying on the monitor an overlaid image including the captured image and an adapting overlayer, the adapting overlayer including a pointer on the target and an overlaid element extending in an area of the captured image delimited horizontally defined with the orientation of the at least one recognizable pattern, on one side by the pointer and on the other side by a side of the monitor extending transversally to the horizontal dimension and corresponding to the cab position in the captured image.