On a wide window, pages now stop growing at about the width a laptop shows and sit in the middle of the space beside the sidebar. A setting's name and its switch, and the lines of text under it, no longer stretch across the whole screen. An area's tabs line up with the page below them.
Pages whose content is wide still use the whole window: the editors, Mail, Team chat, Calendar, Kanban Boards, the Issues and Hiring boards, Staff Scheduling's schedule, Meetings' bookings, Notes and the recording studios.
A team member's page now draws a line between rows, so each area lines up with its switch.