We reorganized features on the console based on key tasks such as, writing code, testing, monitoring and configuring. With this update, we reduced the amount of scrolling needed to access common configuration options by creating a dedicated configuration tab. In addition, the new navigation design orients your work on the Lambda console towards the tasks you want to complete and focuses your work around relevant features. This change will also help you find new features more easily when they are available in the console.
Source:: Amazon AWS