changed legacy app --> custom app

Author: Haley Rowland

articles/iot-central/core/howto-create-and-manage-applications-csp.md

@@ -29,7 +29,7 @@ You land on the Azure IoT Central Application Manager page. Azure IoT Central ke
 
 ![Create Manager for CSPs](media/howto-create-and-manage-applications-csp/image3.png)
 
-To create an Azure IoT Central application, select **Build** in the left menu. Choose one of the industry templates, or choose **Legacy application** to create an application from scratch. This will load the Application Creation page. You must complete all the fields on this page and then choose **Create**. You find more information about each of the fields below.
+To create an Azure IoT Central application, select **Build** in the left menu. Choose one of the industry templates, or choose **Custom app** to create an application from scratch. This will load the Application Creation page. You must complete all the fields on this page and then choose **Create**. You find more information about each of the fields below.
 
 ![Create Application Page for CSPs](media/howto-create-and-manage-applications-csp/image4.png)