Choose the Create Package...item from the Package menu.
The Create Package dialog will appear.
Brief descriptions for the entries are:
Package_Name
Name of the package.
Version
Version number of the package.
Author
Name of the author.
E-Mail
E-Mail address of the author.
If you fill all the entries and click the Create button, a package will be created in the directory specified by the Package Directory item in the Preferences dialog.