Dear Alex,
yes, the option is just a shortcut for the both routines getscr and swgwin, not a correction.
I have now learned that an invisible border of 7 pixels is plotted at the left and right side
of a window since Windows 10, and therefore, the width of the window is reduced by Windows.
So, a workaround would be to move the window by 7 pixels to the left and increase it's width in swgwin.
With best regards,
Helmut