The Notes Tab has three areas in which you may enter and/or review any kind of text you wish:  "My Notes", "Other", "Notes on specific dates."  Use for tasting notes, wine-maker notes, winery info, travel journal, etc.  You can type in the fields or cut and paste from another document or website. 

The "Notes on specific dates" fields are to keep track of each time you drink a bottle(s) of a particular wine.  These notes are entered when you Subtract a Quantity (+) in the Wine Tab.  You can always edit your text in these fields once it has been entered in the "Subtract Bottles" pop-up window.