Display on second monitor with Mac

Using a MacbookPro OS BigSur (Retina screen) and on PsychoPy version 2021.1. and version 2022.1.2.

We are trying to display fullscreen a window with text on a second Monitor (1920x1080) but the displayed window is smaller : 1 third of the screen is black. We did not achieve to modify/shrink the screen with the monitor parameters and settings on PsychoPy or by changing the units. However when we modify the respective positions of both monitor screens under the Mac Screen Settings menu (Mac preferences → Displays → Arrangement), the displayed window still has a small size on the second screen but is moved and aligned relatively to the position of the first screen on the menu.
Thanks in advance !

We managed to fix the issue using the Coder by adding :

win = visual.Window(
    size=[1920, 1980], fullscr=False, screen=1, pos =[0, 180],
    winType='pyglet', allowGUI=False, allowStencil=False,
    monitor='Booth4', color=[0,0,0], colorSpace='rgb',
    blendMode='avg', useFBO=True, 
    units='pix')

Using the builder, we unticked fullscreen window under Screen Properties but we still have the GUI visible and are not sure how to set it unvisible.