Actually, screenshot are also useful for known issues...

wiki/src/contribute/how/documentation/release_notes.mdwn

@@ -26,7 +26,9 @@
       - Electrum: <https://github.com/spesmilo/electrum/blob/master/RELEASE-NOTES>
       - TorBirdy: <https://gitweb.torproject.org/torbirdy.git/tree/ChangeLog>
       - obfs4proxy: <https://anonscm.debian.org/cgit/pkg-privacy/packages/obfs4proxy.git/tree/ChangeLog>
-    - Add [[screenshots|contribute/how/documentation/guidelines#screenshot]] of cool stuff
+    - Add [[screenshots|contribute/how/documentation/guidelines#screenshot]] of
+      - Cool stuff, to show off!
+      - Known issues, if that makes them easier to understand.
     - Document manual steps that persistence users may need to go
       through, taking into account that we support automatic updates
       from the two last releases (not mentioning manual updates).