diff --git a/manual/edit.rst b/manual/edit.rst
index 11c52972b9..a15be4b97d 100644
--- a/manual/edit.rst
+++ b/manual/edit.rst
@@ -814,7 +814,8 @@ The HTML editor has very sophisticated syntax highlighting. Features include:
     * As you move your cursor through the HTML, the matching HTML tags are
       highlighted, and you can jump to the opening or closing tag with the
       keyboard shortcuts :kbd:`Ctrl+{` and :kbd:`Ctrl+}`. Similarly, you
-      can select the contents of a tag with :kbd:`Ctrl+Alt+T`.
+      can select the contents of a tag with :kbd:`Ctrl+Alt+T` or
+      :kbd:`Ctrl+Shift+T`.
     * Invalid HTML is highlighted with a red underline
     * Spelling errors in the text inside HTML tags and attributes such as title
       are highlighted. The spell checking is language aware, based on the value
diff --git a/src/calibre/gui2/tweak_book/editor/smarts/html.py b/src/calibre/gui2/tweak_book/editor/smarts/html.py
index 402b2f2ca4..6d03a04355 100644
--- a/src/calibre/gui2/tweak_book/editor/smarts/html.py
+++ b/src/calibre/gui2/tweak_book/editor/smarts/html.py
@@ -671,6 +671,9 @@ class Smarts(NullSmarts):
         is_xml = editor.syntax == 'xml'
         mods = ev.modifiers() & (
             Qt.KeyboardModifier.ControlModifier | Qt.KeyboardModifier.AltModifier | Qt.KeyboardModifier.MetaModifier | Qt.KeyboardModifier.KeypadModifier)
+        shifted_mods = ev.modifiers() & (
+            Qt.KeyboardModifier.ControlModifier | Qt.KeyboardModifier.AltModifier | Qt.KeyboardModifier.MetaModifier |
+            Qt.KeyboardModifier.KeypadModifier | Qt.KeyboardModifier.ShiftModifier)
 
         if tprefs['replace_entities_as_typed'] and (
                 ';' in ev_text or
@@ -728,7 +731,8 @@ class Smarts(NullSmarts):
             if mods == Qt.KeyboardModifier.ControlModifier:
                 if self.jump_to_enclosing_tag(editor, key == Qt.Key.Key_BraceLeft):
                     return True
-        if key == Qt.Key.Key_T and mods == (Qt.KeyboardModifier.ControlModifier | Qt.KeyboardModifier.AltModifier):
+        if key == Qt.Key.Key_T and shifted_mods in (
+                Qt.KeyboardModifier.ControlModifier | Qt.KeyboardModifier.AltModifier, Qt.KeyboardModifier.ControlModifier | Qt.KeyboardModifier.ShiftModifier):
             return self.select_tag_contents(editor)
 
         return False