Going through this, I think there may be some confusion on both sides, so I’ll do my best to explain what is possible in Scrivener 3 to achieve what you’re looking for. It may not be exactly what you’re imagining, but I think you can get something very close, and it is the same as what is possible in the Mac version for this. It’s also very similar to what was previously possible with the Project Notes, although they are housed in their own section of the binder now rather than together with the synopsis as previously. You haven’t mentioned needing both simultaneously so I don’t know if that’s a problem for you, but if so then there are some other options we could look at for viewing one or the other.
Basically, the way that project bookmarks work now, they are housed in the binder as regular documents (thus allowing you to do a lot of stuff with them not previously possible–compile them, search their text, link directly to them from other documents, etc.). “Project Bookmarks” is essentially a way of pulling these documents together for viewing, the way you used to be able to have multiple project notes that could be viewed via the dropdown in the inspector or as tabs in the Project Notes window. Now with them as bookmarks, when you go to the bookmarks pane in the inspector and choose “Project Bookmarks” from the toggle at the top, you’ll see the list of items you’ve designated as project bookmarks, either by dragging them into this list or by right-clicking on the item and choosing “Add to Project Bookmarks” (also in the Documents menu).
so then you can see your list of project “notes”:
Any of the notes you select in the list will be displayed in the area below, so this is very like what you got with project notes in the inspector in version 1. You can drag the divider between the list and the text area to adjust the height, and you can load different notes from the list by selecting them, the way you previously could switch between project notes. The selected note will stay visible in that pane in the inspector even as you switch documents in the binder, so you have access to it no matter what you’re working on.
As with the Project Notes in version 1, you can also open the project bookmarks in a separate window. There are multiple ways to do this, but one easy way is to select
Project ▸ Project Bookmarks..., which will bring up a little floating panel just listing all the bookmarks, which you can drag into or perform other actions to load the documents different places, and then click the icon in the bottom right of the arrow pointing out of a box. This will open the selected note in a Quick Reference window with the sidebar open to display the list of project bookmarks, similar to the old project notes window with the tabs list of notes. This window can stay open as you work, you can switch between bookmarks, you can hide the bookmarks sidebar to make space by clicking the bookmark icon in the footer, you can adjust the size of the window, etc. Quick Reference panels can be made to float over other windows via
Window ▸ Float Quick Reference panels.
From this panel, with the bookmarks sidebar open, you can also create new documents that will be created as regular binder documents but also automatically added to the project bookmarks list. The first time you do this, e.g. by clicking the “+” icon in the lower left, a dialogue will pop up to let you choose where in the binder you want the document to be created, and you can choose then a particular folder to always house them in the future, so you don’t see the prompt every time. The new document will be created and show up in that bookmarks list, and you can title it and start editing just as with the project notes.
So it seems like the only missing piece of what you’re after (as I’m understanding it) is that it is not currently possible to add a new text “notes” document directly from the project bookmarks list in the inspector. To create a new note from there you will need to create the document in the binder or editor, however you’d normally go about it, and then drag it into the bookmark list. (From the editor you can drag the icon in the header into the list.) You can even do this from the inspector list by selecting a current note and using Ctrl+N to create the new document as a sibling in the binder (useful if you keep them all together in a Project Noes folder, for instance), but you will still need to take the additional step of adding it to the bookmarks. The exception is as mentioned above, if you create the new note from the sidebar in the Quick Reference window (and this can be in any Quick Reference window–you’ll note they always have that bookmark icon in the footer, no matter what document you have loaded.) However, these are actually more options than previously possible anyway, because in version 1 you also could not create a new project note document from the inspector: you instead had to open the Project Notes window and create the new document there, after which you could switch among them from the inspector the same as you can now.
That was quite lengthy, I know, but maybe it helped clarify a bit? The items in the project bookmarks list are not linked to any particular document, the way that document bookmarks are; they’re rather just like the version 1 project notes and project references combined into a single list. So while you do have to add your notes documents to the list when you want to create a new one, you can do so from anywhere, regardless of the document loaded in the editor. It’s worth trying this out a bit in your own project to experiment and see how it works.