A colleague is developing a Windows program and I am developing the same thing for MacOS. In the Windows program, there is the option to open a new window. This window has its own menu bar at the top of the window. Can I have a separate menu bar per window? I am trying to think of a Mac app that does the same but can't find one, so I assume it is not the way it is done. To explain a bit, the user starts the Mac app and select from the main menu, open a text editor window. I want the menu to be different between the first window and the newly opened one. So the text editor menu would have items specific to the text editor. I am using Swift and storyboards, not SwiftUI (yet).

Using Xcode 26 (17A324) I can no longer bring up the Object Library with the '+' at the top right because it is not there. I can use Cmd-Shft-L but how do I make the '+' appear again. The '+' you can see in this screenshot is just for Tabs and Editor pains

Is there a way to make helpviewer wider? At the moment i have a help file where some of the images in it are cut off on the right hand side. I can not make the window wider by tagging the border. Is it something in to the help file itself or is it a limit of helpviewer?