As showcased in this video (https://www.youtube.com/watch?v=IHSmT5I3vP0), there is a button on the Canon camera (Canon 5DS R) which allows the user to zoom into a live view on LCD.
I have highlighted the button in a screen grab of the video above. When the user presses the magnify button, the area in the rectangle will occupy the full area of the LCD, as in the following:
Is there an equavalent function in Fujifilm Xt20?