diff --git a/vscode-extension/src/extension.ts b/vscode-extension/src/extension.ts
index 37268d3f..1e9126e3 100644
--- a/vscode-extension/src/extension.ts
+++ b/vscode-extension/src/extension.ts
@@ -770,7 +770,15 @@ export async function activate(context: vscode.ExtensionContext) {
                 targetPosition = activeEditor.selection.active;
             }
 
-            await showCallChain(targetUri, targetPosition, symbolName);
+            await vscode.window.withProgress(
+                {
+                    location: vscode.ProgressLocation.Window,
+                    title: `DeepLens: Building call chain for ${symbolName || 'symbol'}...`,
+                },
+                async () => {
+                    await showCallChain(targetUri, targetPosition, symbolName);
+                },
+            );
         },
     );
 
diff --git a/vscode-extension/src/reference-code-lens.ts b/vscode-extension/src/reference-code-lens.ts
index d5fb8d84..0e4fa33b 100644
--- a/vscode-extension/src/reference-code-lens.ts
+++ b/vscode-extension/src/reference-code-lens.ts
@@ -175,7 +175,7 @@ export class ReferenceCodeLensProvider implements vscode.CodeLensProvider {
         // 3. Call Chain Lens
         if (this.showCallChain && this.supportsCallChain(symbol.kind)) {
             const callChainLens = new vscode.CodeLens(range, {
-                title: 'visualize call chain',
+                title: '$(call-incoming) visualize call chain',
                 command: 'deeplens.showCallChain',
                 arguments: [document.uri, position, symbol.name],
                 tooltip: `Visualize call hierarchy for ${symbol.name}`,