To create note filled, click on the note field icon in the field toolbar and drag it onto the template display area where you want to be placed.

I was told, but I've not confirm this but if you were to do an evaluation through a trigger on a no field that has 1001 or more characters it will crash the NextGen system. The example I was brought up at the NextGen User Group conference was if you have a note filled on your template that does contain more than 1000 characters then you have a button that checked if the note field was empty or not, the trigger will be ran against the note filled and NextGen will crash. The word to the wize - to anyone that wants to use no fields, do thorough testing on your template before moving it into a production environment.

Remember when using note fields that the note is stored on the server as a rich text format, and not in the database. This may cause some issues if you plan on doing some sort of database reporting on that data.  Check your universal preferences for additional settings.