Update README.md

Updated with usage example (onBefore script) and screenshots

Author: anurampalli

Server-Side Components/Transform Map Scripts/Global Variable in Transform Map/README.md

@@ -51,6 +51,61 @@ Before using this snippet, ensure that:
 
 ---
 
+## Example Scripts
+
+### onBefore Script — Use Global Variable
+
+```javascript
+(function runTransformScript(source, map, log, target /*undefined onStart*/ ) {
+
+    // Name split
+    if (source.u_full_name) {
+        var parts = source.u_full_name.trim().split(/\s+/);
+        target.first_name = parts[0];
+        if (parts.length > 1) {
+            target.last_name = parts.slice(1).join(" ");
+        }
+    }
+
+    // Email normalize
+    if (source.u_email) {
+        target.email = source.u_email.toString().toLowerCase();
+    }
+
+    // Manager mapping
+    var managerMap = this.managerMap;
+    gs.info('manager map: ' + managerMap);
+    if (source.u_manager_email && managerMap) {
+
+        var managerEmail = source.u_manager_email.toString().toLowerCase();
+        var managerSysId = managerMap[managerEmail];
+        gs.info('TM HR User Dump managerSysId: ' + managerSysId);
+
+        if (managerSysId) {
+            target.manager = managerSysId;
+        } else {
+            log.warn("Manager email not found: " + managerEmail + " for user " + source.u_full_name);
+            target.manager = ""; // optional: blank manager instead of error
+        }
+    }
+
+
+})(source, map, log, target);
 ```
 
+---
+
+## Screenshots
+
+| Screenshot                                                                                                | Description                                                      |
+| --------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
+| ![UsingGlobalManagerMapInOnBeforeScriptScreenshot](./UsingGlobalManagerMapInOnBeforeScriptScreenshot.png) | onBefore script referencing the shared variable.                 |
+| ![OnstartScriptScreenshot](./OnstartScriptScreenshot.png)                                                 | onStart script defining the global variable (`this.managerMap`). |
+
+
+---
+
 ```
+
+```
+