I have a grid list of items in the frontend, that belong to different categories. A filter field is shown above the grid. When creating a link to this page, I cannot select a category id, in order to show only the items of a specified category.

Is there a way to "predefine" the filter? For example with an extra parameter in the url like the option, view and layout-parameter.

Thanks in advance

Yes, every filter can be predefined in url :

for instance, combo filter on category :

URL&filter_category=xx