Adding and Removing Keywords
 
A Keyword is a word or short phrase that you assign to cells in an outline to help describe their contents.  For example, you might add the “Urgent” Keyword to cells with important to dos.  One benefit of adding Keywords is the ease in later finding those items using the Keywords page in the Notebook’s Multidex.  So if you add the Urgent Keyword to important items, you can see them all at once by viewing the Urgent entry in the Keywords Multidex page.  NoteBook includes several Keywords and you can add your own.
 
 
Adding a Keyword to a Cell

NoteBook displays the Keywords assigned to cells in the Keywords column, to the left of the red margin line.  Choose View → Keywords to hide or show the Keywords column, and Outline → Add Keyword to display a field for adding a Keyword.
 
With Keywords visible, double-clicking in the Keyword area next to a cell also displays the Keyword entry field .  Click the button to choose from the list of existing Keywords.

Click and hold the Keyword area next to a cell to see all of the Keywords attached to the cell .  Choosing a Keyword from the menu makes it the visible Keyword (the first one in the list).

You can also assign Keywords by control-clicking a Cell and using the contextual menu that appears.  “Favorite” Keywords appear in this menu, which you designate using the Keywords Inspector (Window → Inspector).

You can add as many Keywords to a cell as you like.
 
 
Resizing the Keywords Column

To resize the Keywords column, press the Option key to reveal the column’s boundary, then drag it to a new width.
 
 
Removing Keywords

To remove a Keyword, select the cell and use the Cell Inspector (Window → Inspector) to remove its Keywords.  Or choose a command from the Cell contextual menu.