Switch from Classic to Spark
Classic is the legacy prompt platform that contains developer-centric features.
To switch from Classic to Spark:
Click on your name at the top right corner of the screen.
Click Switch to Spark.
Switch from Spark to Classic
To switch from Spark to Classic:
Navigate to your Account Settings by clicking your name, located at the bottom of the left sidebar.
Click the Full Suite tab in the Account Settings tabs.
Click the button Switch to Full Suite.