While the mouse cursor is on the Online Help item from the Package menu, you can choose the package name of which you are going to read the online manual. If you choose it, a window displaying the manual will appear.
The file you will see is in the ''6#6Package Directory5#5/6#6package name5#56#6version number5#5/man'' directory. Which file will be shown depends on the language environment and the operating system running. If you are in the English environment, you will see the file named ''en.man''. If you are in the Japanese environment, you will see the ''ja_sjis.man'' file on Windows, the ''ja_utf-8.man'' file on Macintosh or the ''ja_euc-jp.man'' file on Linux.
You should complete the manual by editing the file.