Document the feature-gated HUD Scene browser

content/pages/docs/zoo-design-studio/features/workspace/body-pane.mdx

@@ -1,14 +1,17 @@
 ---
-title: Bodies Pane
+title: Bodies
 excerpt: Select and control the visibility of current bodies from the Feature Tree in Zoo Design Studio.
 sidebarPosition: 4
 ---
 
-The Bodies pane appears below the operation history when you open the
-[Feature Tree](/docs/zoo-design-studio/features/workspace/feature-tree). It lists the 3D bodies that
-currently result from your model, with one row for each body.
+The Bodies section appears beneath the
+[Feature Tree](/docs/zoo-design-studio/features/workspace/feature-tree) in the Scene browser tray beside the 3D scene.
+The existing Bodies layout pane also remains available.
+It lists the 3D bodies that currently result from your model, with one row for each body.
+The sections collapse independently: click the Bodies heading to hide or reveal its list.
+Click Scene browser or press `Shift+T` to collapse or expand the whole tray.
 
-Use the Feature Tree to understand how the model was built. Use the Bodies pane when you want to
+Use the Feature Tree to understand how the model was built. Use the Bodies section when you want to
 work with the resulting geometry without finding the operation that created it.
 
 ## What You Can Do
@@ -18,15 +21,20 @@ work with the resulting geometry without finding the operation that created it.
 - Hide or show a body with the eye control on its row.
 - Right-click a body and choose **Delete** to remove it from the model.
 - Select and control individual copies created by a pattern. Each pattern instance has its own row.
-- Resize the Bodies pane and Feature Tree by dragging the divider between them.
+- Resize the Scene browser tray by dragging its right edge. Feature Tree and Bodies share the same
+  width and scroll area. The tray fits its contents rather than blocking unused scene space.
+
+The list uses the same keyboard navigation as the Feature Tree. Focus it to navigate with the
+arrow keys or type the start of a body label. The editable row-action shortcuts also apply:
+`F2` enters actions, `Escape` returns to the row, and `Shift+F10` opens the context menu.
 
 ## Control Body Visibility
 
-Hover over a body row to reveal its eye control. Click the control to hide the body, then click it
+Click a body row's eye control to hide the body, then click it
 again to show the body.
 
 Visibility changes update the model's KCL with a `hide()` operation. A hidden body remains part of
-the design and can still be restored from the pane; hiding it does not delete its geometry.
+the design and can still be restored from the section; hiding it does not delete its geometry.
 
 ## Delete a Body
 
@@ -40,22 +48,22 @@ See [Delete](/docs/zoo-design-studio/features/3d-design/parametric-modeling/tran
 
 The pane shows current model results rather than modeling history. Bodies are labeled `Body 1`,
 `Body 2`, and so on in display order. When an operation consumes an earlier body to produce a new
-result, the pane focuses on the resulting body instead of keeping the intermediate body as a
+result, the section focuses on the resulting body instead of keeping the intermediate body as a
 separate entry.
 
 Patterned geometry is expanded into separate entries for the source body and its copies, making it
 possible to select or hide one instance at a time.
 
 ## What You Cannot Do
 
-- Rename, reorder, or group bodies in the pane.
-- Use the pane to inspect sketches, construction planes, faces, edges, or individual modeling
+- Rename, reorder, or group bodies in the section.
+- Use the section to inspect sketches, construction planes, faces, edges, or individual modeling
   operations. Use the Feature Tree for those items.
 - Treat visibility as deletion. Hidden bodies remain in the model and in its KCL.
 
 ## Key Differences in This Area
 
-- The Feature Tree shows the ordered operations that build the model; the Bodies pane shows the
+- The Feature Tree shows the ordered operations that build the model; the Bodies section shows the
   current body-level results.
 - Selecting a body works at the geometry level while remaining linked to its source code.
 - Visibility is parametric model state recorded in KCL, not a temporary viewport-only setting.

content/pages/docs/zoo-design-studio/features/workspace/feature-tree/index.mdx

@@ -4,18 +4,35 @@ excerpt: Manage model history with the feature tree in Zoo Design Studio.
 sidebarPosition: 3
 ---
 
-The Feature Tree shows the ordered operations used to build the current model.
+The Scene browser is being rolled out gradually. If it has not been enabled for your account,
+use the existing Feature Tree and Bodies layout panes.
 
-The [Bodies pane](/docs/zoo-design-studio/features/workspace/body-pane) below it lists the current
+The Feature Tree shows the ordered operations used to build the current model in a
+Scene browser tray docked to the side of the 3D scene. It fits its contents and scrolls when space is
+limited, leaving the scene below it available for interaction. Click the Scene browser heading or press
+`Shift+T` to collapse the tray into a small sidebar icon; click the icon to expand it. Drag its
+right edge to resize every section together. The toggle tooltip shows your current shortcut;
+you can change it in keybinding settings under **Scene browser**.
+The existing Feature Tree and Bodies layout panes remain available alongside the Scene browser.
+
+Click anywhere on the Feature tree row to collapse or expand just the operation history.
+
+Default planes, operation history, and bodies use the same tree rows. A divider separates the
+planes from operations, and keyboard navigation moves between both sections in one tree.
+
+The [Bodies section](/docs/zoo-design-studio/features/workspace/body-pane) beneath it lists the current
 body-level results, so you can select and control finished geometry separately from its operation
 history.
 
-<FramedImage
-  src="/documentation-assets/docs/zoo-design-studio/features/workspace/feature-tree/feature-tree.webp"
-  alt="Zoo Design Studio feature tree"
-  aspect="706 / 1154"
-  maxHeightPx={460}
-/>
+## Keyboard Navigation
+
+Focus the tree to navigate rows with the up and down arrows. Use the right arrow to expand a
+branch and the left arrow to collapse it. Type a label's beginning to move to a matching row.
+Selection follows the model's existing single-selection behavior.
+
+Press `F2` to enter a row's actions, `Escape` to return to the row, or `Shift+F10` to open its
+context menu. These action shortcuts are registered commands and can be changed in the keybinding
+settings.
 
 ## What You Can Do
 

content/pages/docs/zoo-design-studio/features/workspace/index.mdx

@@ -36,7 +36,7 @@ across part modeling, assemblies, and direct KCL editing.
 - Work directly in the 3D graphics area while opening and closing panes as needed.
 - Resize split areas by dragging pane boundaries.
 - Use the left and right pane zones for different tools and editors.
-- Use pane shortcuts such as `Shift+T` for Feature Tree and `Shift+C` for Code Editor.
+- Toggle the Scene browser tray with `Shift+T`, and the Code Editor pane with `Shift+C`.
 
 ## Key Differences in This Area