Some environment variables are set in config files, some are set by CircleCI, some are secret, and some are set by..... some thing else!

When I'm looking at a build I would like to be able to examine the value and details of the environment variables. What is it's value, is it redacted, where is it set. Currently I have to hunt it down in several different locations, and that can take a long time when you're not familiar with a project. Perhaps a feature where hovering over the variable would show you its value, or a legend that shows details of every environment variable used in the build/workflow.