Using absolute scale in a project that is set up for responsive scale

Hi, I am working on a project that uses responsive scale to initially load/anchor an object and the user is able to manipulate the object’s size and rotation. I want to add a button to this project which will scale the object to it’s actual true life size. I know this can be achieved by absolute scale but I don’t want to set my project to use the absolute scale because it does not work very well, it loses tracking very often so I want to continue using the responsive scale which scales the model according to the height of the camera relative to the detected plane. I am fine if the model initially loads at a relative scale but I want to add a feature to the project where the user can see the model in its true life size by pressing a button. How would I implement such functionality so as to mimic what absolute scale does in a responsive scale project?