Check that both monitors are running the same resolution. 

Also run "xdpyinfo" (rpm is xdpyinfo if you don't have it installed, I don't know if this tool works on wayland or not) and see if the listed size of the screens and dpi is similar on both monitors.   I have seen some devices that the EDID info is wrong and because of that it calculates the DPI wrong and adjusts sizes based on that data.  MIne produces output like this:

Screen #0:
  dimensions: 3840x2160 pixels (1016x571 millimeters)
  resolution: 96x96 dots per inch

Mine is actually 940mm x 530mm so EDID lists my monitor as about 8% bigger than it really is

Windows may have a monitor device table that it uses that has correct values in it, or windows 7 may not be playing any DPI scaling games.



On Sat, Apr 9, 2022 at 10:22 AM home user <mattisonw@comcast.net> wrote:
On Mon, 4 Apr 2022 at 23:15, home user <mattisonw@comcast.net> wrote:

 > [... snip ...] But windows and text are obviously bigger on this new
monitor
 > than on the remaining older Dell U2711. Is there a way of making
things appear
 > the same size on the P2412H (too big) as on the U2711 (about right)?

This problem persists.  I've spent a lot of time in settings tools,
"NVIDIA X Server Settings", and Fedora documentation trying to find a
solution.  Nothing helped. If it matters, I upgraded to Fedoa-35 this
past Thursday (April 07).  This is a dual-boot workstation, and when I
boot into windows-7, text, windows, etc. appear the same size on both
monitors.

Any suggestions?
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