Update with note

Author: vmpstr

cssom-view-1/Overview.bs

@@ -1190,6 +1190,10 @@ partial interface Element {
 };
 </pre>
 
+Note: The {{CheckVisibilityOptions/checkOpacity}} and {{CheckVisibilityOptions/checkVisibilityCSS}} properties are historical names.
+These properties have aliases that match the new naming scheme,
+namely {{CheckVisibilityOptions/opacityProperty}} and {{CheckVisibilityOptions/visibilityProperty}}.
+
 The <dfn method for=Element>getClientRects()</dfn> method, when invoked, must return the result of the following algorithm:
 
 1. If the element on which it was invoked does not have an associated [=CSS/box=] return an empty {{DOMRectList}} object and stop this algorithm.
@@ -1249,15 +1253,15 @@ Note: The {{DOMRect}} object returned by {{Element/getBoundingClientRect()}} is
     1. If an ancestor of |this| in the [=flat tree=]
         has ''content-visibility: hidden'',
         return false.
-    1. If either the {{CheckVisibilityOptions/checkOpacity}}
-        or the {{CheckVisibilityOptions/opacityProperty}}
+    1. If either the {{CheckVisibilityOptions/opacityProperty}}
+        or the {{CheckVisibilityOptions/checkOpacity}}
         dictionary members of |options|
         are true,
         and |this|, or an ancestor of |this| in the [=flat tree=],
         has a computed 'opacity' value of ''0'',
         return false.
-    1. If either the {{CheckVisibilityOptions/checkVisibilityCSS}}
-        or the {{CheckVisibilityOptions/visibilityProperty}}
+    1. If either the {{CheckVisibilityOptions/visibilityProperty}}
+        or the {{CheckVisibilityOptions/checkVisibilityCSS}}
         dictionary members of |options|
         are true,
         and |this| is <l spec=css-display>[=invisible=]</l>,