Gmail Changes Coming 2-20-2020

We’re updating the way multiple inboxes work in Gmail. Specifically, starting February 20, 2020, for Rapid release domains and March 5, 2020, for Scheduled release domains, we’ll enhance multiple inboxes to support independent scrolling, a unified toolbar, and adjustable width in right-side configurations. In addition, starting on those dates, multiple inboxes will no longer support three-pane layouts with the preview pane (renamed “reading pane”) view.