Mac Window

Anatomy — every part, named

1. 1
   Title barNSWindow.titleVisibility

   “The strip across the top of the window” is the title bar, which can remain present even when its title text is hidden.

2. 2
   Window drag regionNSWindow.isMovableByWindowBackground

   The blank area you grab to move the window is its drag region, not necessarily the visible title text.

3. 3
   Window titleNSWindow.title

   The document or screen name printed in the title bar is the window title.

4. 4
   Unified toolbarNSWindow.ToolbarStyle.unified

   When the title and window actions share one top row, that chrome uses the unified toolbar style.

5. 5
   Toolbar itemNSToolbarItem

   One button, field, or flexible space placed in the window toolbar is a toolbar item.

6. 6
   Title-bar accessoryNSTitlebarAccessoryViewController

   “The little control inside the title bar” is a title-bar accessory, separate from both the toolbar and traffic lights.

7. 7
   Title-bar separatorNSWindow.titlebarSeparatorStyle

   The hairline between the window's top chrome and its content is the title-bar separator.

8. 8
   Window tabsNSWindowTabGroup

   Tabs in the window frame group separate document windows; they are not an NSTabView inside the content area.

9. 9
   Resize edge / cornerNSWindow.StyleMask.resizable

   “The tiny corner grip” means the resize edge or corner, which may be interactive even when no grip is drawn.

Prompt — paste into your agent

In code

The exact names this thing goes by in code — each row is one framework’s word for it. Use the row that matches your project (or paste it into your prompt).

See also