# Editor.PanelWindow.RoundedCorners

```csharp
bool RoundedCorners { get; set; }
```

Whether the compositor rounds the window's corners, the way it rounds the OS's own menus.
Popups ask for it. Windows 10 and earlier stay square.

Declared in [Editor.PanelWindow](/api/Editor.PanelWindow).
Assembly: `Sandbox.Tools`.