To edit information for multiple products at once, navigate to the 'Inventory - Products' section and click on the 'Quick control' button.
After clicking the 'Quick control' button, a new window will appear that will allow you to edit information for multiple products simultaneously. Within this window, you'll be able to modify information across several columns, including SKU, Barcode, Price, Wholesale cost, Netto, and Brutto.
In addition to editing information, you can also open a product's individual card from within this section by clicking on its name. This will take you to a detailed view of the product where you can access and modify more specific information.