The main window

+----------------------------------------------------------------------------+
| File  View  Help                                                           |
+----------------------------------------------------------------------------+
| Game [ saved games dropdown ......... ] [Add game...] [Start][Restart][Kill]|   Game bar
| [Scan][Monitor 1][Monitor 2][Stability][Focus]     [Destroy][Reset All][Shutdown] |   Main actions
| +------------------------------------------------------------------------+ |
| | HWND | Title            | Class | Status | PID | X | Y | W | H          | |   Window table
| |  ...                                                                   | |   (grows with the window)
| +------------------------------------------------------------------------+ |
| [ Window | Position & Size | Presets | Downscale | Display | Game config | GPU & Power | Capture | HelixSR | Magpie | Reports ] | Tabs
| +------------------------------------------------------------------------+ |
| |  controls for the selected tab                                         | |
| +------------------------------------------------------------------------+ |
| status message    Magpie FSR: 1280 × 720 → 1920 × 1080 (150 %)  Focus  exe |   Status bar
+----------------------------------------------------------------------------+

Game bar

Control	What it does
Dropdown	Your saved games. Type to filter. Picking one makes it the target.
Add game...	Register an .exe/.bat/.cmd and name it. Steam games are added by themselves.
Start	Launch the selected game. If a game is already running, asks whether to close it first (a game is never started twice).
Restart	Terminate it, then launch it again.
Kill	Terminate it.

More in Games and launching.

Main actions

Button	What it does
Scan	Read the window list again and pick the best window (the list also follows the game by itself).
Monitor 1 / Monitor 2	Move the selected window to that monitor (the current one is green).
Stability	While on, if the game moves or resizes its window away from where you put it, it is put back.
Focus	Bring the game window to the front.
Destroy	Ask the selected window to close (WM_CLOSE).
Reset All	Restore normal window styles and forget the saved position for this game.
Shutdown	Terminate this session's game and its loader processes (asks first).

Window table

Lists title, class, visibility, PID and rectangle for each window of the target. The active window, the one every button and tab acts on, is the green, bold row with Status Active. See Window controls.

Tabs

Tab	What it is for
Window	Show, hide, minimise; Windowed, True Borderless FS, Fit Screen, Fit to monitor; extended styles. Window controls
Position & Size	Move, resize, exact size, overscan, saved position. Window controls
Presets	One-click sizes from 1920x1080 to 7680x4320. Window controls
Downscale	Render larger than the monitor and show it scaled down. Downscaled view
Display	The PC's display settings, and the game's own while it runs. Display settings
Game config	Render scale, resolution and JConfig window in the game's own config files. Game config
GPU & Power	Graphics cards and drivers, the card the game uses, power plan and mode. GPU and power
Capture	Screenshots of the active window as PNG, one or a burst. Window controls
HelixSR	Set up HelixSR and put it into FSR 3.1 games. HelixSR

Menus

Menu	Items
File	Add game..., Find Steam games, Open config file, View logs..., Exit
View	Always on top, Window opacity, Confirm before terminating a game, Check window fit after launching a game, Fit window to monitor..., Game info overlay (show, corner, in screenshots), Keep this app off the game's monitor, Release the mouse, Switch focus: game / this app, Focus switch hotkey..., Terminate the game (press twice), Terminate hotkey..., Minimize to floating bar, Switch to floating bar, Stop downscaled view, Move this app to the other monitor
Help	Help topics (F1), Keyboard shortcuts, Logs and troubleshooting, Online wiki, About

Status bar

The left side shows the result of your last action. On the right, while a game runs: what scales its picture (Magpie FSR: 1280 × 720 → 1920 × 1080 (150 %, upscaling), or No scaler: window 1280 × 720, not scaled (1:1); orange with the reason in the tooltip when something is in the way, see Game info overlay), who has the keyboard (Focus: game / app), and the target program's file name (the full path in its tooltip). Every result is also written to the log; see Logs and troubleshooting.