Thinking about depth: Using it to present stacks of information (version history, undo/redo chain) Using it to render background information that doesn't need

Thinking about depth: Using it to present stacks of information (version history, undo/redo chain) Using it to render background information that doesn't need to be swapped into the foreground to be useful - the architecture/module that the code you're working in serves, the remote services that fulfill certain commands, the test coverage available to you in this module.