How can I change the resolution for a specific program?

My default resolution is 1920x1260 but I have one program that runs best at 1260x1028. How can I set it up so the resolution changes when I run that program then changes back when it ends?

I don't think you can do that. You can select the program.exe file, go to the Properties / Compatibility tab and select "Disable DPI scaling on high dpi settings". You can also select "Run in 640x480 screen resolution" but that will be too large.
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Thanks. I've tried both of those & they don't solve the problem. I guess I'll just have to live with it for now. The problem isn't technical but I was hoping for a technical solution. The problem's biological-my eyes can't see small details in images any more. (I can see text fine as long as it isn't too small-and text is usually easy to resize.) The technical solution is a bigger monitor-but I work on a laptop & 17" is pretty much as large as it gets, I think. If anybody knows of a laptop with a 20" screen I'd be pleased to hear about it. Thanks.

Sometimes there are problems with applications. I found iTunes is blurry on a 2560x1440 monitor at 125% zoom but it's OK if you disable dpi scaling. However, you then find that the Store apps don't display correctly and the information on the right hand side is truncated. This appears to be a common problem with Tunes users.

and go full screen in the game and back out again, you will have a minimized game window that is 640x480

I just tried Nirsoft's Nircmd utility, and it failed to change screen resolution (with no error message). I remembered something from Doug Knox which I used years ago on XP, and whilst I may have the program on an archive somewhere, his web site is no more, and I failed to find his nifty program anywhere (and have no idea if it would cope with W10). So I googled, and found QRES here: Download QRes 1.1

I just tried it and it works fine. A simple batch file does the trick:

Code:

REM created by MNG 7/6/21 to test screen resn change
REM using QRES from Download QRes 1.1
REM Be careful which download you select!

path "C:\Program Files\utils"
qres /x:1024
MiniToolBox.exe
qres /x:1920 /y:1080

Note that selecting the horizontal resn (/X:1024) was enough to switch to 1024x768, but specifying just the /X:1920 setting to switch back resulted in an error, and I had to specify /Y also. I got it to run a windows program whilst switched, to confirm that the batch file (as expected) just hangs until control is returned - so no loop necessary.

hth, Martin