When creating notes, it is sometimes necessary to refer to other notes. Now I need to this by copying its title or creation date. A number is far easier and more foolproof.
Even better is when this referring number is a clickable link. You can then easily jump to the other note (or open it next to the note you are reading).
The most powerful expansion is when you can search for all notes that referring to the note you are reading. This way, you can view all notes that are in someway related. For example if each note is a step in a process.
OK, I might get a little overexcited
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)