1.1 --- a/compositing-2/Overview.bs Mon Dec 02 10:37:53 2019 -0800
1.2 +++ b/compositing-2/Overview.bs Tue Dec 03 09:17:51 2019 -0800
1.3 @@ -716,15 +716,14 @@
1.4 The <a href="#isolatedgroups">isolated group</a> for the root element is the
1.5 root element group. All other elements and groups are composited into this group. The background of the root element (if specified) is painted into the
1.6 root element group, and any filter, clip-path, mask and and opacity is then
1.7 -applied, before compositing into the <a href="#rootgroup">root group</a>.
1.8 +applied, before compositing into the <a href="#rootgroup">root group</a>,
1.9 +if present.
1.10
1.11 <h3 id="rootgroup">The Root Group</h3>
1.12 -The root group encompasses the entire canvas and contains (or is below) the page group.
1.13 +The root group encompasses the entire canvas and contains (or is below) the root element group of the root element of a web page.
1.14
1.15 <p class="note">Browsers often use an infinite <a href="https://www.w3.org/TR/css-color-4/#sample">white, 100% opaque</a> root group,
1.16 -for final compositing, but this is not required. For example, an iframe may
1.17 -have a transparent background, and therefore the root group contains content
1.18 -from an ancestor document.
1.19 +for final compositing, but this is not required.
1.20
1.21 <h2 id="advancedcompositing">Advanced compositing features</h2>
1.22
