Update syntax tree viewer docs

docs/dev/README.md

@@ -154,19 +154,21 @@ There are also several VS Code commands which might be of interest:
 
 * `rust-analyzer: Status` shows some memory-usage statistics.
 
-* `rust-analyzer: Syntax Tree` shows syntax tree of the current file/selection.
-
 * `rust-analyzer: View Hir` shows the HIR expressions within the function containing the cursor.
 
-  You can hover over syntax nodes in the opened text file to see the appropriate
-  rust code that it refers to and the rust editor will also highlight the proper
-  text range.
+* If `rust-analyzer.showSyntaxTree` is enabled in settings, `Rust Syntax Tree: Focus on Rust Syntax Tree View` shows the syntax tree of the current file.
+
+  You can click on nodes in the rust editor to go to the corresponding syntax node.
+
+  You can click on `Reveal Syntax Element` next to a syntax node to go to the corresponding rust code and highlight the proper text range.
 
   If you trigger Go to Definition in the inspected Rust source file,
-  the syntax tree read-only editor should scroll to and select the
+  the syntax tree view should scroll to and select the
   appropriate syntax node token.
 
-  ![demo](https://user-images.githubusercontent.com/36276403/78225773-6636a480-74d3-11ea-9d9f-1c9d42da03b0.png)
+  You can click on `Copy` next to a syntax node to copy a text representation of the node.
+
+  ![demo](https://github.com/user-attachments/assets/2d20ae87-0abf-495f-bee8-54aa2494a00d)
 
 ## Profiling