diff --git a/common/modules/swh-fuse.org b/common/modules/swh-fuse.org
index 3597a0b..f2c62ab 100644
--- a/common/modules/swh-fuse.org
+++ b/common/modules/swh-fuse.org
@@ -1,139 +1,151 @@
 #+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
 #+INCLUDE: "prelude.org" :minlevel 1
 
 ** Software Heritage Filesystem (SwhFS)
   :PROPERTIES:
   :CUSTOM_ID: oneslide
   :END:
 *** 
     The *Software Heritage Filesystem (SwhFS)* is a user-space POSIX filesystem
     that enables browsing parts of the Software Heritage archive as if it were
     locally available.
 
 *** 
     - code: [[https://forge.softwareheritage.org/source/swh-fuse/][forge.softwareheritage.org/source/swh-fuse]]
     - documentation: [[https://docs.softwareheritage.org/devel/swh-fuse/][docs.softwareheritage.org/devel/swh-fuse]]
 *** 
     #+BEGIN_EXPORT latex
     \begin{thebibliography}{Foo Bar, 1969}
     \bibitem{Allancon2021} Thibault Allançon, Antoine Pietri, Stefano Zacchiroli
     \newblock The Software Heritage Filesystem (SwhFS): Integrating Source Code Archival with Development
     \newblock ICSE 2021: The 43rd International Conference on Software Engineering
     \newblock \url{https://arxiv.org/abs/2102.06390}
     \end{thebibliography}
     #+END_EXPORT
 
 ** Software Heritage Filesystem (SwhFS) --- Example                :noexport:
   :PROPERTIES:
   :CUSTOM_ID: examplemini
   :END:
 *** 
 #+BEAMER: \footnotesize
 #+BEGIN_SRC
 $ mkdir swhfs
 $ swh fs mount swhfs/  # mount the archive
 $ cd swhfs/
 
 $ cat archive/swh:1:cnt:c839dea9e8e6f0528b468214348fee8669b305b2
 #include <stdio.h>
 
 int main(void) {
     printf("Hello, World!\n");
 }
 
 $ cd archive/swh:1:dir:1fee702c7e6d14395bbf5ac3598e73bcbf97b030
 $ ls | wc -l
 127
 $ grep -i antenna THE_LUNAR_LANDING.s | cut -f 5
 # IS THE LR ANTENNA IN POSITION 1 YET
 # BRANCH IF ANTENNA ALREADY IN POSITION 1
 #+END_SRC
 * Software Heritage Filesystem (SwhFS) --- Tutorial
   :PROPERTIES:
   :CUSTOM_ID: tutorial
   :END:
 ** Software Heritage Filesystem (SwhFS) --- Tutorial
+  :PROPERTIES:
+  :CUSTOM_ID: tutorial1
+  :END:
 *** 
   #+BEGIN_SRC
 $ pip install swh.fuse  # install SwhFS
 
 $ mkdir swhfs
 $ swh fs mount swhfs/  # mount the archive
 
 $ ls -1F swhfs/  # list entry points
 archive/  # <- start browsing from here
 cache/
 origin/
 README
 #+END_SRC
 
 ** Software Heritage Filesystem (SwhFS) --- Tutorial (cont.)
+  :PROPERTIES:
+  :CUSTOM_ID: tutorial2
+  :END:
 *** 
   #+BEAMER: \footnotesize
   #+BEGIN_SRC
 $ cd swhfs/
 
 $ cat archive/swh:1:cnt:c839dea9e8e6f0528b468214348fee8669b305b2
 #include <stdio.h>
 
 int main(void) {
     printf("Hello, World!\n");
 }
 #+END_SRC
 
 ** Software Heritage Filesystem (SwhFS) --- Tutorial (cont.)
+  :PROPERTIES:
+  :CUSTOM_ID: tutorial3
+  :END:
 *** 
   #+BEAMER: \footnotesize
   #+BEGIN_SRC
 $ cd archive/swh:1:dir:1fee702c7e6d14395bbf5ac3598e73bcbf97b030
 
 $ ls | wc -l
 127
 
 $ grep -i antenna THE_LUNAR_LANDING.s | cut -f 5
 # IS THE LR ANTENNA IN POSITION 1 YET
 # BRANCH IF ANTENNA ALREADY IN POSITION 1
 #+END_SRC
 
 ** Software Heritage Filesystem (SwhFS) --- Tutorial (cont.)
+  :PROPERTIES:
+  :CUSTOM_ID: tutorial4
+  :END:
 *** 
   #+BEAMER: \footnotesize
   #+BEGIN_SRC
 $ cd archive/swh:1:rev:9d76c0b163675505d1a901e5fe5249a2c55609bc
 
 $ ls -F
 history/  meta.json@  parent@  parents/  root@
 
 $ jq '.author.name, .date, .message' meta.json
 "Michal Golebiowski-Owczarek"
 "2020-03-02T23:02:42+01:00"
 "Data:Event:Manipulation: Prevent collisions with Object.prototype ..."
 
 $ find root/src/ -type f -name '*.js' | xargs cat | wc -l
 10136
 #+END_SRC
 
 ** Software Heritage Filesystem (SwhFS) --- Tutorial (cont.)
 *** 
   #+BEAMER: \footnotesize
   #+BEGIN_SRC
 $ swh web search git-annex --limit 1
 ...
 git://git.joeyh.name/git-annex.git \
   https://archive.softwareheritage.org/api/1/origin/git://git.joeyh.name/git-annex.git/visits/
 ...
 
 $ swh web search git-annex --url-encode | cut -f 1
 git%3A%2F%2Fgit.joeyh.name%2Fgit-annex.git
 
 $ cd origin/git%3A%2F%2Fgit.joeyh.name%2Fgit-annex.git
 $ ls -F
 2020-12-19/
 
 $ ls 2020-12-19/snapshot/refs/heads/master/root/
 Annex/                COPYRIGHT           NEWS
 Annex.hs              Creds.hs            P2P/
 Assistant/            Crypto.hs           README
 Assistant.hs          Database/           Remote/
 Backend/              debian/             RemoteDaemon/
 #+END_SRC