Index: lams_tool_mindmap/web/includes/javascript/mapjs/main.js
===================================================================
diff -u -ra65568cc36db07abf19550359c0db03a9561c964 -r3f1cdbe95a07a577e1dc525031794d094de7fad1
--- lams_tool_mindmap/web/includes/javascript/mapjs/main.js	(.../main.js)	(revision a65568cc36db07abf19550359c0db03a9561c964)
+++ lams_tool_mindmap/web/includes/javascript/mapjs/main.js	(.../main.js)	(revision 3f1cdbe95a07a577e1dc525031794d094de7fad1)
@@ -19381,6 +19381,13 @@
 					cancelEditing();
 				}
 				e.stopPropagation();
+			// check if it s a printable character
+			} else if (String.fromCharCode(e.keyCode).match(/(\w|\s)/g)){
+				const content = textBox.innerText();
+				// LAMS Modification - LDEV-4656 Restrict to 100 chars
+				if (content && content.length >= 100) {
+					return false;
+				}
 			}
 		},
 		attachListeners = function () {