To set filtering options, you have to:

1. Log in to Administration Panel
2. Go to "Settings" cart in "Configurations" tab
3. Go to "General" section  and choose "Catalog" option
4. Przejść do panelu filters_and_sorting
5. In the upper part of the panel, select from the drop-down list the option "Form"
6. When you click on "enableGenericFiltres", a drop-down list will appear in which you can select the filtering options that will be available to end user. 
7. After selecting the sorting option settings, save the changes by clicking the "Update" button next to the section

 Filtering options to choose:

• Brand 
• Label 
• Stocks  
• Availability 
• Manufacturer 
• productSeries