By default a Notezilla sticky note is automatically sized to content. The note will resize automatically as you keep typing.
Watch this video to know how Notezilla does this:
After typing or pasting some text in a sticky note, you must remove the focus from the sticky note (by clicking somewhere else outside the stick note) in order to resize the note automatically.
Plus, if you resize a note manually, the sticky note stops resizing automatically. All this is done for intuitive behavior of the app.