Delete key
This gives users the option of forcing non-WorldScript savvy applications that attempt to delete 2-byte text one byte at a time to delete text 2 bytes at a time. At first glance, this may appear to conflict with the Delete by Jamo option in the Power Input Method (PIM). The PIM option is for text being processed by the input method before it is passed to an application. The Hangul Jojung control panel setting is the opposite. It is for text already entered into a document. The Hangul Jojung control panel simply forces an application to receive one or two Deletes every time the user types one Delete. The only time this is really needed is when using Asian languages in applications which aren't WorldScript II savvy.
1 or 2 byte PostScript printing
Users of printer-resident 2-byte Korean PostScript fonts need to set this option in order to embed PostScript data in PostScript files. It affects users who have printer-resident fonts that are genuine two-byte encoded. (Without the Hangul Jojung control panel, printing is done assuming one-byte fonts.) Users who have this issue should immediately see a performance increase when the Hangul Jojung control panel is installed. Users with no PostScript fonts, just Apple's TrueType fonts included in the Korean, Japanese and Chinese language kits should receive no benefit nor side effects from having the Hangul Jojung control panel installed.
*The following information is for Apple Internal & Support Providers Only*