The master window switch designates which window is considered the primary, or "master," window in the main pane of a tiling layout. Depending on configuration, it may simply focus the master or swap it with another window.
In tiling window managers, the screen is often divided into a large master area and a stack of secondary windows. The master window switch changes which window occupies that prominent space, altering focus order, window sizing, and how the layout reflows. The exact keystrokes and visual cues are configurable and vary by environment.
How the master area works in tiling layouts
Key concepts to understand how the master switch affects your workspace:
- Definition: The master window is the window in the main pane, typically the largest or leftmost tile in the tiling layout.
- Focus vs position: Switching can change which window is focused or which one occupies the master pane.
- Layout impact: Moving or swapping may resize the master pane and adjust the stack accordingly.
- Visual cues: The master window may have a distinct border, emphasis, or size indicator.
- Scope: In multi-monitor setups, the master area can be per-monitor, with changes applying on the active screen.
In short, the master switch governs which window is treated as the primary in the layout and how the layout responds when you switch it.
Common implementations and how to use it
Different window managers implement this in different ways. Here are general patterns and how you might use them.
Dynamic tiling managers (dwm and similar patches)
In dwm and related tilers, the master area is the first tile. A typical workflow involves keybindings that move the focused window into the master position or swap it with the current master. The exact keys and behavior depend on your configuration and any patches you’ve installed, but the goal is to give quick control over which window is primary and how the screen is divided.
Per-monitor and multi-layout environments (i3, bspwm, and friends)
On setups with multiple monitors or layouts that separate master and stack areas, the master switch often applies to the active monitor, leaving others unchanged. Shortcuts or commands may include "focus master," "swap with master," or "toggle master" actions, all configurable via the window manager’s config.
What to check in your setup
If you’re unsure how your system handles the master window switch, look for:
- Your window manager’s keybindings or shortcuts related to focusing, swapping, or promoting a window to master.
- Documentation or config files that describe the master area’s behavior and size ratio.
- Whether the behavior is per-monitor or global across all screens.
Understanding these basics will help you customize the master window switch to match your workflow.
Summary
The master window switch is a feature in tiling window managers that controls which window holds the primary position in the main pane. It can involve focusing the master, swapping with another window, and changing how the layout resizes. The exact behavior depends on the window manager and your configuration, so consult your docs or config to tailor it to your workflow.