The top bar is the only chrome that persists. The sidebar is gone; the page scrolls sideways through a rail of fixed-width columns.
Each column is 424px wide and stands the full viewport height beneath the 48px navigation, so a column always fills the screen top to bottom.
Scroll horizontally to walk the rail. The columns keep their width, so the reading measure never changes as you move across them.
Because only the navigation stays fixed, the layout works on mobile: one column shows at a time and a swipe carries you to the next.
A hairline divider separates every column, matching the template grid so the horizontal shell reads as one system with the default page.
The body of each column is composed from the same Form kit as every other tools page; here it is only a heading and a paragraph for the label.
Theme, font, grain, and column controls still live in the top bar and the fixed toolbar, so the horizontal layout keeps the full tools chrome.
This is the last of eight columns. Reach it by scrolling the rail to the far right; the navigation above has not moved the whole way across.