diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
index ebac20d39..a62c552e1 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
@@ -41,6 +41,7 @@
         function gotoLine(row, col)
         function getCursorPosition()
         function setTheme(name)
+        function setFontSize(size:Number) //Set a new font size (in pixels) for the editor text.
         function on(name, cb)
         function getUndoManager()
 
@@ -1183,6 +1184,9 @@ RED.editor.codeEditor.monaco = (function() {
             o.isClean = isClean.bind(ed);
             return o;
         }
+        ed.setFontSize = function setFontSize(size) {
+            ed.updateOptions({ fontSize: size });
+        }
         //#endregion "ACE compatability"
 
         //final setup