Most of the lower section of the main program screen contains the various data fields for you to add details about each item in your inventory.  Each field is labeled as to the type of data it should contain.

There are also three possible User-Defined fields that can be activated from the Options window.  

For a complete list of available fields,and what data they are intended to contain, take a look at the Inventory Express Field List.

Possible values for three fields, Category, Era and Grade, are predefined, may not be changed, and the fields will accept no other values. To view possible values, see Inventory Express Predefined Dropdown Selections.