actually embedded into the Appearance Manager. The Appearance Control Panel has the ability to attach a theme to the Appearance Manager. There is an Apple Platinum file in the themes folder in the System Folder which acts as a stub, but no functional theme elements are embedded into it. Customizable palettes ('clut' resources) are used for progress bars, scroll thumbs, slider tabs and menu selections in Apple Platinum and this unique option is not available to real themes. The Appearance Control Panel uses the type code 'pltn' to identify if a file should act like a palette modification stub to Apple Platinum and the type code 'thme' to identify if a file should act like an Appearance Theme. An important distinction is that the Appearance Control Panel implements themes into the Appearance Manager. Kaleidoscope is third-party software that implements schemes into the Appearance Manager. Kaleidoscope is not a substitute for the Appearance Manager; it is a substitute for the Appearance Control Panel. Apple widely demonstrated two Appearance Themes which override Apple Platinum, Hi-Tech and Gizmo. Hi-Tech is based on a shades-of-black color scheme that made the interface look like a contemporary piece of audio-visual equipment. Gizmo is a period-appropriate Memphis-style interface, using many bold colors, patterns, and "wiggly" interface elements. Both changed every single element of the overall GUI, leaving no trace of Apple Platinum. A third theme, Drawing Board, was later introduced, developed at Apple Japan. This theme uses elements that make the interface look like it has been drawn in pencil on a drafting board, including small "pencil marks" around the windows, a barely visible graph paper grid on the desktop, and "squarish" elements with low contrast. Although themes are supported in all released versions of Mac OS 8.5 through 9.2.2, the three aforementioned themes were only present in pre-release versions of Mac OS 8.5 and were removed without explanation in the final release. One retrospective review by a long-time Mac user described the themes as being a mistake and waste of engineering resources, saying the "Hi-Tech" theme "looked like a typical dark over-decorated techno skin that became popular for Linux desktops" and that "Gizmo" looked "awful...the Finder in a clown suit". Typography By default, a font called Charcoal is used to replace the similar Chicago typeface that was used in earlier versions of the Mac OS. A number of additional system fonts are also provided, including Capitals,