It sounds like you're referring to KWin, the window manager for the KDE Plasma desktop environment, and its ability to manage window tiling and snapping. KWin allows you to arrange windows in a grid or specific layout, often referred to as "rectangle" tiling.
To use KWin's tiling features, you can usually:
1. **Drag windows to the screen edges**: This will snap them to half or quarter of the screen.
2. **Use keyboard shortcuts**: For example, Meta (Windows key) + Arrow keys to snap windows to different parts of the screen.
3. **Configure custom tiling scripts**: You can use KWin scripts to create more complex tiling layouts.
If you need more specific instructions or have a particular setup in mind, let me know!
