add release documentation for thumbnail sizes

content/guides/media-library/media-library-setup/index.md

@@ -697,6 +697,22 @@ module.exports = {
 }
 ```
 
+## Thumbnail Sizes
+
+{{< added-in "release-2026-03" block >}}
+
+When working with image agency feeds, users often need to visually scan through large volumes of images, for example to pick relevant photos from a live coverage event or to identify the start and end of a photo series. The thumbnail size on Media Library Dashboard screens can be adjusted to fit these needs.
+
+![Media Library with adjustable thumbnail sizes](thumbnail-sizes.png)
+
+Three sizes are available: **Small (S)**, **Medium (M)** and **Large (L)**. The number of columns adjusts based on the screen width and the selected size.
+
+The setting works on Media Library Dashboard screens opened from the main navigation as well as on dashboards within the document editor side panel.
+
+Media Library Dashboard screens use the full available screen width. The detail side panel extends to the right edge. Scrolling through search results works like infinite scrolling without interruptions.
+
+The size setting is stored in local storage and shared across all Media Library Dashboard screens.
+
 ## Metadata Translations
 
 First, you have to configure the available languages in the system as [described here]({{< ref "/guides/editor/multi-language-content.md" >}})

content/operations/releases/release-2026-03.md

@@ -64,6 +64,7 @@ These are the release notes of the upcoming release (pull requests merged to the
 - :fire: Integration against the upcoming release (currently `main` branch) is at your own risk
 
 ## PRs to Categorize
+
 - [Bump minor version for release management](https://github.com/livingdocsIO/livingdocs-editor/pull/10779)
 - [Bump minor version for release management](https://github.com/livingdocsIO/livingdocs-server/pull/8976)
 - [Add image collections](https://github.com/livingdocsIO/livingdocs-editor/pull/10700)
@@ -228,6 +229,16 @@ module.exports = {
 }
 ```
 
+### Media Library Thumbnail Sizes :gift:
+
+When working with image agency feeds, users often need to visually scan through large volumes of images, for example to pick relevant photos from a live coverage event or to identify the start and end of a photo series.
+
+The thumbnail size on Media Library Dashboard screens can now be adjusted between small (S), medium (M) and large (L). The dashboard also uses the full available screen width and scrolling through results works like infinite scrolling without interruptions.
+
+{{< img src="release-2026-03-thumbnail-sizes.png" alt="Media Library with adjustable thumbnail sizes" >}}
+
+For more details, refer to the [Media Library Thumbnail Sizes guide]({{< ref "/guides/media-library/media-library-setup/index#thumbnail-sizes" >}}).
+
 ## Vulnerability Patches
 
 We are constantly patching module vulnerabilities for the Livingdocs Server and Livingdocs Editor as module fixes are available. Below is a list of all patched vulnerabilities included in the release.