The stock item list screen has two (2) mode options available: 

• Default mode option - This is a plain list view of the stock items on which the data in the columns is not editable.
• Advanced mode option - This mode will enable the following options:
• The data in the columns on the stock item grid can be edited (like you would in a spreadsheet).
• Add the Export / Import, Adjust stock and Settings tabs.  

By default, the "Single line mode" option is selected (ticked). The details for each of the stock items in the list will display in a single line. 

If this  option is selected, a column header "Use your mouse to pull a column here to group on that column" will be displayed and the similar data in columns can be grouped.

Advanced mode : Single line mode - Selected

If the "Advanced mode" option is selected, the Advanced mode button's caption, will change to Default. It will enable the following options:

• The data in the columns on the stock item grid can be edited.
• Add the Export / Import, Adjust stock and Settings tabs.

Advanced mode : Single line mode - Not selected 

The data for each of the stock items in the list can not be edited. You need to select a stock item and edit the details in the Stock item form.