How can separate the screens in two diffrent window?

How can separate the screens in two diffrent window?

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

At the moment, the only way to do this would to stretch the screen across two monitors (the monitors must be the exact same) or to use a custom layout by editing the qt-config.ini file. A way to easily split it across two monitors isn’t implemented yet but there are feature requests open for it on the GitHub.

Thank you.
I followed this guide in ytube Citra Tutorial / Use Your Phone As The Bottom 3DS Screen - YouTube
and it worked well except issue in 6:39
I checked everything in borderless but still the bottom screen its self cut for some reason
any suggestion or idea ?
thank you again