diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index a41f2c60..5435b6ca 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -894,5 +894,9 @@
   "prompt_add_tags_force_lang": {
     "message": "The tags must be written in",
     "description": ""
+  },
+  "prefs_OptionText_btnManagePrompts_infoline3": {
+    "message": "You can use the {%tags_full_list%} data placeholder in the prompt to list the available tags. With an appropriate prompt, you could then force the tags to be chosen only from the list of those already existing.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/pages/addtags/mzta-add-tags.html b/pages/addtags/mzta-add-tags.html
index c85d8b06..f7e0f81f 100644
--- a/pages/addtags/mzta-add-tags.html
+++ b/pages/addtags/mzta-add-tags.html
@@ -53,7 +53,8 @@
     <div id="addtags_prompt_container">
         <span class="section_title">__MSG_AddTags_prompt_text_title__</span><span id="addtags_prompt_unsaved" class="unsaved hidden"> __MSG_customPrompts_unsaved_changes__</span>
         <br><span class="infoline">__MSG_prefs_OptionText_btnManagePrompts_infoline__ <a href="https://micz.it/thunderbird-addon-thunderai/data-placeholders/">__MSG_customPrompts_managePrompts_help__</a>
-        <br><b>__MSG_prefs_OptionText_btnManagePrompts_infoline2__</b></span>
+          <br>__MSG_prefs_OptionText_btnManagePrompts_infoline3__
+          <br><b>__MSG_prefs_OptionText_btnManagePrompts_infoline2__</b></span>
         <br>
         <div class="autocomplete-container">
             <textarea id="addtags_prompt_text" rows="15"></textarea>