Everyone has the Notebooks chooser

From the development repository at 1ccf212.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/guest.md

@@ -51,8 +51,8 @@ place in it waits for the host to return.
 Across the top is the toolbar, one row holding everything in three
 groups: on the left the tools, their settings and **Undo**; in the
 middle the page and the view; on the right the host's page buttons,
-your notebook, and **Session**, which opens a window with the
-participants and the invitation.  Below it the page has the whole width of the window.  Every button
+**Notebooks**, your notebook, and **Session**, which opens a window with
+the participants and the invitation.  Below it the page has the whole width of the window.  Every button
 explains itself: rest the pointer on it for two seconds and its
 explanation appears beneath it.
 
@@ -216,6 +216,14 @@ mouse delivers.
 Every page of the session is saved for you, as it changes, without your
 doing anything.  Where it is saved depends on how you joined.
 
+**Notebooks** in the toolbar opens a chooser that shows your notebooks
+and small pictures of the pages kept in them, wherever they are kept.
+There you can delete pages and notebooks you no longer want: mark them
+with the × at their left, then press **Delete** twice.  In the browser
+a deleted page is gone for good; with the Kokkoja program it goes to the
+Trash.  Starting a page for everyone from a kept page is the host's
+business, and a co-host's.
+
 ### In the browser
 
 When you joined by opening the link, your notebook is kept inside the
@@ -300,13 +308,10 @@ right of your toolbar:
   size, centred, 5 mm below the image above or at the top of the page;
   one wider than the page widens it.  To put an image on a page of its
   own, press **New** first.
-* **Notebooks** starts a new page for everyone from a page kept in one of
-  your notebooks, with everything that was written on it.  A chooser
-  shows your notebooks and small pictures of their kept pages.  The kept
-  page itself is not changed: the session works on a copy.  The same
-  chooser deletes pages and notebooks of yours, marked with the × at
-  their left and then the **Delete** button, pressed twice; the host's part says
-  more.
+* **Notebooks**, which everyone has, now also starts a new page for
+  everyone from a page kept in one of your notebooks, with everything
+  that was written on it: choose the page in the chooser.  The kept page
+  itself is not changed: the session works on a copy.
 * **Hide**, among the tools, hides part of the page for everyone: drag
   open a rectangle and whatever lies under it, writing included, is
   covered in white, marked by blue corners so that nobody writes there