Casement helps large desks in three ways: layouts such as thirds, four columns and six-up for big displays, a Dock that stays on the display you choose, and a control to switch a screen off without unplugging it. Window lists and the switcher make it easier to find windows across screens.
Layouts that suit big screens
Halves are fine on a laptop and clumsy on a 34-inch ultrawide. Casement offers thirds, four columns, main-plus-two and six-up when a large external monitor is attached.
A Dock that stays put
macOS moves the Dock to the display your pointer touches at the bottom. Casement can keep it on the one you choose. See Dock screen.
Turning screens off
Switch a display off from the control panel and keep the cable in. One display always stays on, and ⌃⌥⌘D turns all back on. See turn off a display.
Finding windows
With windows spread across screens, ⌥Tab lists every one by title.
A sample desk
A laptop plus a 34-inch ultrawide: lid open with its screen switched off, ultrawide in three columns (editor, browser, chat), Dock pinned to the ultrawide, window switcher for anything hidden behind. One keystroke, ⌃⌥⌘D, restores every display if something goes wrong.
Questions people ask
Does each monitor get its own layouts?
Yes, slots are based on the display you drop the window on.
Try Casement
Casement is a menu-bar app for Mac that puts each Chrome profile in the Dock as its own icon and adds snap layouts, hover-to-focus, a window switcher, Dock window lists, a drop shelf and display controls..