The Environment tab shows the environmental variables that are currently set on your machine (that is, driver). More specifically, runtime information such as Java Home, Java Version, and Scala Version can be seen under Runtime Information. Spark properties such as Spark application ID, app name, and driver host information, driver port, executor ID, master URL, and the schedule mode can be seen. Furthermore, other system-related properties and job properties such as AWT toolkit version, file encoding type (for example, UTF-8), and file encoding package information (for example, sun.io) can be seen under System Properties.