In order to use the Checkbox widget, create a new page from wp-admin>pages:
Now edit the page with Elementor:
Type EazyFilter in the search box and drag the Checkbox widget. Here we have the product widget that we created from before:
Now we have to select a filter to render:
Now you can either create a new filter by clicking the highlighted button or use an existing filter. For this tutorial we will use an existing Product Color filter:
After selecting the grid and choosing appropriate filter you now have the filter ready for use:
On the left side, you have control over Query ID, Apply Type, Apply on, Show filter Name, Flow Direction:
When you press publish you are ready to use your freshly minted filter: