The option is enabled for Notepad by default.
Maybe you have changed it.

Though on Windows 11, Notepad is tabbed editor (but it still runs separate process for each opened file).

Hi all

If you go to the General Preferences (Tools -> Preferences...),
then select the "Editors" page,
then Edit the "Notepad" item,
you will see there that the setting
"External Editor opens each File in a Separate Window (Process)" is set to False.

Why is that?

After all, Notepad is not a tabbed Editor, it cannot edit more than one file in one program instance,
and therefore must create a new Process per each File opened.

What is the difference If we change that setting to True instead of False - here for Notepad?

Thank you