The Notes Tab allows a use to add in miscellaneous notes to their PC. This can be done by right clicking on the item on the right hand side and selecting the appropriate value such as:
Add-Adds a new item
Remove-Removes the item
Rename-Renames said Item
Move-Moves the selected item around the tree.
Using it this way you can have multiple items within items all described differently and having different notes and values within each. This is useful for carrying equipment that a PC might have and stating "X is in this pouch" with the pouch on the left and the materials therein described on the right.