This screen allows you to create and edit items individually (without using an Excel file).
In the Setup -> Items, in the "Items" tab select Add button (+) if you wish to create an item.
To Edit an existing item's details, select the item and click the Edit button.
To delete an existing item, select the item and click the "X" button.
You will be presented with the Add or Edit Item Screen.
Make sure to fill in all the required fields, as well as other informative fields you need to be displayed in the catalog.
If your item requires dimensions (Color or Size), add them via the "+ Add" button on the bottom of the screen.
Each color/size combination you add will require a unique Item Code.
Fill in all required fields about the "child" item you created and Click Save.