# Filter Notebooks based on "In collection(s)"

**URL:** <https://talk.observablehq.com/t/filter-notebooks-based-on-in-collection-s/10954>\
**Category:** Feedback\
**Created:** [November 3, 2026, 8:25pm UTC](https://talk.observablehq.com/t/filter-notebooks-based-on-in-collection-s/10954 "2026-11-03T20:25:58Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![akrawitz](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/akrawitz/32/4375_2.png) [@akrawitz](https://talk.observablehq.com/u/akrawitz)\
**Post date:** [November 3, 2026, 8:25pm UTC](https://talk.observablehq.com/t/filter-notebooks-based-on-in-collection-s/10954/1 "2026-11-03T20:25:58Z")

</div>

I try to keep my notebooks organized. I find this to be a challenge since all of the notebooks are in one big “pile” (as opposed to being “inside” folders as in a hierarchical file system). One way I do this is by trying to make sure every notebook is assigned to (at least one) relevant collection.

It would be great if the **Notebooks** page had a **Filter** for **In collection(s)/Not in collection(s)**. This would make it very easy to find “orphaned” notebooks.