diff --git a/pages/customprompts/mzta-custom-prompts.html b/pages/customprompts/mzta-custom-prompts.html
index 30049b14..cedae75c 100644
--- a/pages/customprompts/mzta-custom-prompts.html
+++ b/pages/customprompts/mzta-custom-prompts.html
@@ -12,7 +12,8 @@
         <p>__MSG_customPrompts_managePrompts_info_default__<br>
             __MSG_customPrompts_managePrompts_info_default_2__<br>
             __MSG_customPrompts_managePrompts_info_default_3__ <a href="https://micz.it/thunderbird-addon-thunderai/custom-prompts/">__MSG_more_info_string__</a>
-        <br>__MSG_prefs_OptionText_btnManagePrompts_infoline__ <a href="https://micz.it/thunderbird-addon-thunderai/data-placeholders/">__MSG_more_info_string__</a></p>
+        <br>__MSG_prefs_OptionText_btnManagePrompts_infoline__ <a href="https://micz.it/thunderbird-addon-thunderai/data-placeholders/">__MSG_more_info_string__</a>
+    <br><button id="btnManageCustomDataPH">__MSG_prefs_OptionText_btnManageCustomDataPH__</button></p>
     </div>
     <div id="import_export">
         <button id="btnExportAll">__MSG_customPrompts_ExportAll__</button><br>
diff --git a/pages/customprompts/mzta-custom-prompts.js b/pages/customprompts/mzta-custom-prompts.js
index 85d0ae34..4da2c278 100644
--- a/pages/customprompts/mzta-custom-prompts.js
+++ b/pages/customprompts/mzta-custom-prompts.js
@@ -18,7 +18,7 @@
 
 import { prefs_default } from "../../options/mzta-options-default.js";
 import { getPrompts, setDefaultPromptsProperties, setCustomPrompts, preparePromptsForExport, preparePromptsForImport } from "../../js/mzta-prompts.js";
-import { ChatGPTWeb_models, isThunderbird128OrGreater, getLocalStorageUsedSpace, sanitizeHtml, validateCustomData_ChatGPTWeb, getChatGPTWebModelsList_HTML } from "../../js/mzta-utils.js";
+import { ChatGPTWeb_models, isThunderbird128OrGreater, getLocalStorageUsedSpace, sanitizeHtml, validateCustomData_ChatGPTWeb, getChatGPTWebModelsList_HTML, openTab } from "../../js/mzta-utils.js";
 import { taLogger } from "../../js/mzta-logger.js";
 import { getPlaceholders, placeholdersUtils } from "../../js/mzta-placeholders.js";
 import { textareaAutocomplete } from "../../js/mzta-placeholders-autocomplete.js";
@@ -369,6 +369,10 @@ document.addEventListener('DOMContentLoaded', async () => {
 
 }, { once: true });
 
+document.getElementById('btnManageCustomDataPH').addEventListener('click', () => {
+    openTab('../pages/customdataplaceholders/mzta-custom-dataplaceholders.html');
+  });
+
 //========= handling an item in a row 
 function handleEditClick(e) {
     e.preventDefault();