You can organize your invoices into categories. This makes it easy for you to sort our your invoices.

To view existing categories or create new ones, click on the 'Categories' link

This brings up the invoice category listing page

The 'Actions' button gives you the options to view. edit and delete a category. Deleting a category does not delete the invoices associated with it.

The category listing page also displays the count of invoices in each category.