To create a usage portfolio, go to the Warehouse>Usage>Usages module. Select the portfolio mode on the file menu. Click new file.
Write the name of the portfolio on the usage area. Select the warehouse and usage group and add the stock items that are planned to be created for usage without amount using the add record menu. Save the usage and switch back from the portfolio mode.
Select the current portfolio with the yellow Open File button.
Enter the desired numbers and update the usage. Leave the unwanted stock items empty.