On the category page (frontend) I'd like to select multiple value. For example if I select the color blue, then the filter 'Color' will be removed from the left side of the screen.
I'd like to keep the filter visible even if I select it so that I can select let say another color (or mutliple sizes or brands..), without installing any extension.
Thing is I never worked with layered filter that much before in Magento so I don't know where to start and what to look for.
Could someone point me in the right direction? Thank you.