Can't find the "Build File Properties" dialog box, Help

In the Help Window under the Ant Integration section, the following is
mentioned

Specify custom classpaths Also you may want to use additional libraries within your Ant scripts. Such libraries can be your custom tast definitions. These libraries, as well as the other required paths, can be passed to Ant by adding them to the list of Additonal Classpaths in the Build File Properties dialog Can you tell me the location of where this "Build File Properties dialog box" is. The only dialog box that I can find is under File -> Project Properties ->]]> Path, where there are the following sections

Project
Source Path
Classpath, Exclude
Javadoc Paths
Libraries.


But I think there is another dialog box called "Build File Properties"
dialog box, but I can't find where it is located.

Do u know where it is ?? Kindly let me know.