You might want to open two files in two separate windows to compare them. Also, if you want to edit two files simultaneously, you need to open them separately. That is why you can change Notepad ...

Want to view more than one file at a time in Notepad? See how Notepad tabs work, along with easier ways to navigate them.

Notepad is the default text editor found ... on the app icon and select Properties Under the General tab, you’ll see an ‘Open With:’ option. Click on the change button next to it From ...

and a new app setting lets you customize whether files open in new tabs or a new window by default. The Notepad app with two opened files. There will also be new keyboard shortcut keys to support ...