In the section on "Creating and Converting Colors Using Color Spaces", the documentation incorrectly claimed that the colorUsingColorSpace: method would not convert between color spaces. The exact limitations have been clarified.

Removed statement that drawing to printers doesn't support alpha.

Added cross-reference in "Adding Custom Color Pickers to a Color Panel" to "Working WIth Color Spaces."

Clarified named color spaces and system colors, gave an example of binding NSColor to user defaults, and showed how to make a custom color picker.

Added "Working WIth Color Spaces" and rewrote "About Color Spaces." Changed title of document from "Using Color."

Added the task Using the System Control Tint.

Added the task Storing NSColor in User Defaults.

Revision history was added to existing topic. It will be used to record changes to the content of the topic.