To get you right: You have Monitors with the same physical dimensions, but different resolutions and want to avoid windows jumping in height when moving them to the other screen?
Your PC does not know anything about the Physical Size of your Screens (27"), so he thinks that your Monitors have a different Size, as they have different resolutions. That's the reason, why Windows shows the 4k monitor as a bigger rectangle in the display settings.
This leads to the situation, that application windows have a different size on monitor A than on monitor B.
There is simply no way to align two monitors with different resolution without an offset.
But Windows has built in the Feature of Display Scaling, which basically renders a Monitor to a different resolution. You maybe already use this feature on your 4k monitor. It is very common on today's Laptops, which have a small but high resolution display, otherwise everything would be way to small to read.
(This works similar to Apple's retina technology).
To align both monitors without offset, you would have to scale down the monitors, so that their (vertical) resolution fits:
If scaling is not supported by this factor in Windows, you could lower the resolution on the 4k screen to XY x 1440 px.
This however has two disadvantages:
- You loose effective Space on your display
- The scaling Factor of 0.66 is not a power of 2, so elements like text look probably very fuzzy on the Monitor.
This probably avoids the annoying mouse jumpings and is helpful for the OP, but I don't think it is an answer to OP's question. – Jounathaen – 2018-10-31T10:43:12.023
3Maybe not for the OP but this was exactly what I needed. Thanks. And I donated. – oyalhi – 2019-01-16T16:58:54.730
2Thanks, I really was looking for something like this :-) – user3651113 – 2019-08-05T00:06:13.060