Winter '27 adds a small but welcome quality-of-life change for admins: the Setup sidebar can now be collapsed.
Where
Setup and Object Manager. The left navigation sidebar gains a collapse control, spotted in Winter '27 preview orgs.
How
Click the collapse toggle to hide the sidebar and reclaim the full width of the screen. Expand it again whenever you need to jump to another Setup node. Your working area, not the navigation tree, gets the space.
Why
Many Setup pages, think Object Manager field lists, flow lists, or permission set overviews, are wide tables squeezed next to a permanent sidebar. Collapsing it gives you meaningful extra room on smaller screens and makes long working sessions in Setup less cramped.