Perform the following steps:
- Navigate to the Application Insights' Overview tab and click on the Metrics menu, as shown in the following screenshot:

- Metrics Explorer is where you will find all of your analytics regarding different metrics. In Metrics Explorer, click on the Edit button of any report to configure your custom metric, as shown in the following screenshot (or you can click on the Add chart button in the top left of the following screenshot):

- Thereafter, you will be taken to the ...