The "Speak selected text when key is pressed" feature allows selected text from any application to be read via a key combination. From Mac OS X 10.1 to Mac OS X 10.6, the feature would copy the selected text to the clipboard and read it from there. From Mac OS X 10.7 to Mac OS X 10.10, a new implementation of the feature required software developers to implement a speech synthesis API into their applications. This prevented the clipboard from being overwritten, but also meant that, for applications that did not use the API, the feature would not function as expected, reading the title bar rather than the selected text.