@@ -35,3 +35,15 @@ When a project is started two further buttons is visualised, and settings is the
 - **A**: Save project.
 - **B**: Reset to start.
 - **C**: Setting, is further explained in settings.
+
+## Sample structure view
+The **Model** page has a **Structure** tab next to **Reflectivity** showing a schematic of
+the current model's layer stack: one colored box per layer, ambient medium on top, substrate
+at the bottom. Boxes share a color per material (see the legend), box heights follow layer
+thickness, and repeated multilayers with many repetitions are drawn once with a "× N" badge.
+
+Hover a box for its material, SLD, thickness and roughness; click it to select that layer in
+the sidebar editor. The view updates immediately when the model changes, including after a fit.
+
+Note the view is a schematic, not a to-scale cross-section: heights are clamped so very thin
+layers stay visible and very thick ones do not crowd out the rest.