docs: add shape and label styling tutorial

tutorials/index.md

@@ -93,6 +93,16 @@ time, images rasterized for the window only, and how it differs from
 `bounding_box_query`.
 :::
 
+:::{grid-item-card} Styling shapes and labels
+:link: /notebooks/tutorials/styling_shapes_and_labels
+:link-type: doc
+:img-top: /notebooks/_static/img/styling_shapes_and_labels.png
+
+Control how shapes and labels are drawn: `fill_alpha`, the `outline`
+toggle with `outline_width`/`outline_color`/`outline_alpha`, hollow
+shapes, `scale`, and segmentation boundaries via `contour_px`.
+:::
+
 ::::
 <!-- gallery-cards-end -->
 
@@ -109,4 +119,5 @@ scalebars
 marker_shapes
 multichannel_images
 cropping
+styling_shapes_and_labels
 ```