Hello
Hope this will help (as I am French  )
Open Windows 10 Parameters
Click on 	Ease of access
	The first line addresses your font size problem
On the same screen, on this same right side, by scrolling downwards, look for something like 
	Associated parameters      COLOURS PARAMETERS (click on)
	Then scroll down and select  
choose your default application mode
and, finally, select ‘dark’
Edited by Ingres (09/17/19 03:45 AM)
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from now on, on some forums, I make a screen copy... in case... time will tell
imagine some people you know having more power...luckily God knows best! Take it easy ... and funny!