The classic Mac OS Finder uses a spatial metaphor quite different from the more browser-like approach of the modern macOS Finder.[1] In the classic Finder, opening a new folder opens the location in a new window: Finder windows are 'locked' so that they would only ever display the contents of one folder. It also allows extensive customization, with the user being able to give folders custom icons matching their content. This approach emphasizes the different locations of files within the operating system, but navigating to a folder nested inside multiple other folders fills the desktop with a large number of windows that the user may not wish to have open.[2] These must then be closed individually. Holding down the option key when opening a folder would also close its parent, but this trick was not discoverable and remained under the purview of power users.