Under the General Notes tab, you can add any other important information about this Package, such as additional items included with the Package, minimum or maximum numbers required, and so on.
These General Notes will be the default notes that appear in the Package when it is added to an event, and those notes will be visible on the Event Confirmation.
You can simply type your notes directly into the memo field, or if you want to add more sophisticated formatting, you can open the Word Processor and work on your document there.
