As reported on #26698, which was originally opened as an IDLE issue, but which I turned into a tkinter issue, one can also sharpen text buy opening python(w).exe properties, Compatibility tab, clicking [Change high DPI settings], and then checking [] Override high DPI scaling behavior while leaving the default 'Application'.  The effect is the same as 'SetProcessDpiAwareness (1)' -- or (2) if monitor is not changed.