docs(snapshots): Add wipe and onion diff mode examples

docs/product/snapshots/reviewing-snapshots/index.mdx

@@ -56,14 +56,24 @@ In your project settings, you can configure status check behavior to conditional
 
 ## Sentry UI
 
-You can view all images for an upload in the Sentry UI.You can filter for specific statuses (modified, added, removed, renamed, unchanged) and view the diff in three modes: split, wipe, and onion:
+You can view all images for an upload in the Sentry UI and can filter for specific statuses (modified, added, removed, renamed, unchanged).
 
-- **Split** — Side-by-side view of base and current branch with a diff overlay highlighting changed pixels.
-- **Wipe** — Drag a slider across the image to compare base and current branch.
-- **Onion** — Overlay both images with an adjustable opacity slider.
+### Viewing Snapshot Diffs
+
+There are three diff modes:
+
+**Split:** Side-by-side view of base and current branch with a diff overlay highlighting changed pixels. Optionally you can choose to change the color or hide the mask overlay.
 
 ![Example of the Sentry UI split diff mode](../img/sentry_ui_split_diff.png)
 
+**Wipe:** Drag a slider across the image to compare base and current branch.
+
+![Example of the Sentry UI wipe diff mode](../img/sentry_ui_wipe_diff.png)
+
+**Onion:** Overlay both images with an adjustable opacity slider.
+
+![Example of the Sentry UI onion diff mode](../img/sentry_ui_onion_diff.png)
+
 ### Finding Snapshots
 
 You can get to a specific snapshot from the links on the status check or through the Sentry Releases page.