> For the complete documentation index, see [llms.txt](https://story.groupthought.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://story.groupthought.com/story-theme-v1/collections/collection-filtering.md).

# Collection filtering

![](/files/-MVT9ihWY3Q3ta6ksL97)

## Setup

Start by adding custom product tags to your products in the Shopify Admin:

![Tip: Add multiple tags to link with multiple filter groups](/files/-MVw3HCerqJbRVTfV48L)

![Adding tags to products in the Shopify Product editor](/files/-MVw3RYN5NfZJMoAwfYD)

In the Theme Editor under Collection, Collection page. In the Content section, choose Add tag grouping:

![Use Add Tag grouping for each filter group](/files/-MVw3mSdVbWs7zC21f7q)

Add a Group name which will be displayed as the heading for the filter group. Followed by a list of tags for the group.

![Use a comma after each tag ](/files/-MVw46XSuDKLulXSvsEq)

Example of comma separated tags:

```
2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
```

![](/files/-MVw4P3J9291MW9MqVJ6)