diff --git a/cssom-view-1/Overview.bs b/cssom-view-1/Overview.bs
index b64fc29bf4be..d574554554f6 100644
--- a/cssom-view-1/Overview.bs
+++ b/cssom-view-1/Overview.bs
@@ -1806,6 +1806,8 @@ interface VisualViewport : EventTarget {
readonly attribute double scale;
+ readonly attribute FrozenArray<DOMRect> segments;
+
attribute EventHandler onresize;
attribute EventHandler onscroll;
attribute EventHandler onscrollend;
@@ -1856,6 +1858,21 @@ The scale attribute must run these steps
1. If there is no output device, return 1 and abort these steps.
1. Otherwise, return the visual viewport's scale factor.
+The segments is an array of DOMRects that represent the dimensions of each existing viewport segment.
+
+A viewport segment represents the region of the visual viewport that resides on a separate display or logical display region.
+When the visual viewport spans across some number of physical features of a device, these features in turn convey a logical separation of the space available for content.
+
+The segments attribute must run these steps:
+1. If the visual viewport's associated document is not fully active, return 0.
+2. Returns null if called from within an iframe context and abort these steps.
+3. Returns null if there is only a single viewport segment and abort these steps.
+4. Otherwise, return the visual viewport's segments array.
+
+Note: Based on the data returned for each viewport segment, developers will be able to infer the number of hinges available as well as the hinge orientation.
+The browser window can be moved/resized such that the number of segments and/or their dimensions change.
+In these cases, resize events will fire at which point authors should re-query this property, as the returned FrozenArray is just a snapshot of the current state.
+
onresize is the event handler IDL attribute for the resize event.
onscroll is the event handler IDL attribute for the scroll event.