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From: John-Paul Stewart <jpstewart@personalprojects.net>
Newsgroups: comp.os.linux.misc
Subject: Re: Multi-Monitor-Problem
Date: Thu, 18 Aug 2022 11:46:16 -0400
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On 2022-08-17 10:02, Jörg Barres wrote:
> Hi folks,
> 
> is the following possible?
> 
> Linux Mint with one 17"-Monitor (1280x1024) and one beamer (1920x1080).
> 
> I want to mirror the desktop but not loose the 1920-resolution on the
> beamer. Instead I want a downscaling for the 17".
> 
> Is there a tool?

Yes. The xrandr command should do what you want with the --same-as
option (to make the second output a duplicate of the first) and either
the --scale or --scale-from option.  I'd start by trying:

xrandr --output <OUT-1> --size 1920x1080 \
	--output <OUT-2> --size 1280x1024 \
	--scale-from 1920x1080 --same-as <OUT-1>

where <OUT-1> and <OUT-2> are your graphics card's output names for the
beamer and the monitor, respectively.  You'll probably have to query
xrandr for the actual names that your system uses.