diff --git a/Changelogs/v2.1.0.md b/Changelogs/v2.1.0.md
index 6a0fcccb..5fdf21ac 100644
--- a/Changelogs/v2.1.0.md
+++ b/Changelogs/v2.1.0.md
@@ -20,7 +20,7 @@ release-candidate users too, not only to those coming from 2.0.x.
 - **Multi-tab content navigation** with a window tab bar and per-tab history
 - **Generic type specialization** — inspect Swift generics with concrete arguments filled in
 - **Background indexing** — the sidebar is ready when you click into it, not seconds later
-- **Inspector → Relationships** — see who references a type, and what a type depends on
+- **Inspector → Relationships** — a class's subclasses and a protocol's conforming types, gathered across every indexed binary
 - **Batch export** interfaces for multiple images in one pass
 - **Theme settings** with a data-driven color model and a built-in Xcode preset
 - **Jump to Definition** for Swift type references
@@ -48,9 +48,21 @@ interface alongside the original unspecialized form.
   silently producing garbage.
 
 #### Inspector → Relationships
-A new **Relationships** tab sits between *Hierarchy* and *Specialization*. It
-lists inbound references (who uses this type) and outbound references (what
-this type depends on), drawn across every binary the document has loaded.
+A new **Relationships** tab sits between *Hierarchy* and *Specialization*,
+answering the question a single interface listing cannot: what else in the
+loaded binaries builds on this type.
+
+- Select a **class** and it lists that class's direct subclasses.
+- Select a **protocol** and it lists the types that conform to it.
+
+Both are unioned across every indexed image rather than looked up in the image
+that defines the target, so a subclass or conformer living in a different
+binary still shows up. Images that are loaded but not yet indexed contribute
+nothing, so the list fills in as background indexing catches up.
+
+Objective-C and Swift classes and protocols are covered, including classes
+bridged between the two. Other kinds — structs, enums, categories — have no
+relationships to show.
 
 #### Jump to Definition for Swift types
 Command-click a Swift type reference in the content view to navigate to its