The size of the Dock can be altered and even hidden when not in use, but it can't be moved. Window Shade is also history. Open and Close buttons on Finder windows are now grouped in the upper left corner and look like a sideways traffic light. Control Panels are now called System Preferences. The Sheets feature now saves your pictures and documents, replacing pop-up dialogue boxes.
Sheets travel with the window they modify without preventing users from accessing other windows.
Keeping up appearances Quartz, OS X's new 2D graphics system gives it an ultra-crisp appearance. Based on Adobe PDF technology, Quartz makes features like icon drop shadows and translucent menus possible. The pulsating blue user interface is called Aqua, which is full of redesigned buttons and menus. OS X's graphics system includes built-in OpenGL and QuickTime 4.6, making new levels of display possible. Users can now play a QuickTime movie within the Finder window without having to open a separate application.