Merge "Document s/x/z keyboard shortcuts"

polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html

diff --git a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
index 427a042..9325828 100644
--- a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
+++ b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
@@ -220,6 +220,18 @@
             <td>Reload the change at the latest patch</td>
           </tr>
           <tr>
+            <td><span class="key">s</span></td>
+            <td>Star (or unstar) change</td>
+          </tr>
+          <tr>
+            <td><span class="key">x</span></td>
+            <td>Expand all messages</td>
+          </tr>
+          <tr>
+            <td><span class="key">z</span></td>
+            <td>Collapse all messages</td>
+          </tr>
+          <tr>
             <td></td><td class="header">File list</td>
           </tr>
           <tr>