Game config

The Game config tab changes settings in the selected game's own config files: the resolution the game draws at, and its window. The app writes them when you press Start / Restart, before the game starts, because the game reads its files only at start-up.

It works for Unreal Engine 4 games that read loose config files: the exe is in <Project>/Binaries/Win64 and there is a <Project>/Config/DefaultEngine.ini. Tekken 7's arcade builds (Fated Retribution and Round 2) are like that, and so are some other arcade and older PC releases. Most store games keep their config packed or in your user folder; for them the tab says it cannot change anything. For a game started through a .bat file the app uses the exe the script started last time.

The settings

Setting	What it changes
Write these settings when <game> starts	On: the settings below are written on every Start / Restart. Off: the files are left as they are.
Render scale	The resolution the 3D scene is drawn at, in percent (Unreal's r.ScreenPercentage). Above 100 % supersamples: the game draws larger and the engine scales it down to the window, which gives smoother edges and needs more from the graphics card. Below 100 % draws smaller and scales up: faster, but softer. The window and the menus stay at the resolution. Game's own leaves it alone.
Resolution	The game's resolution: in the engine's settings, in the user settings, in r.setres, and for Tekken in JConfig's DX resolution. In a window, the game makes its window this size.
JConfig window	Tekken 7 arcade only (JConfig's DX Window Mode): where JConfig puts the game's window. Pick a monitor to make the window fill it. Tekken puts its window back to this rectangle whenever it gets the focus, so this is the setting that stops it from shrinking to 1280 x 720.

Write now writes the settings at once (restart a running game to see them). Restore originals puts the game's own values back. Open folder opens the game's Config folder.

Turning the tab off does not undo Write now

The settings stay in the game's files until you change them or press Restore originals: switching Write these settings when <game> starts off only stops the app writing them again. The game info overlay shows what the files hold (Game files) while the game runs.

Now in the files shows what the files hold right now, so you can see the effect of each button.

Render scale explained (with an example)

Think of the render scale as how many pixels the game draws before it fits the picture into your window. The window stays the same size; only the drawing inside it changes.

With a 1920 x 1080 window:

Render scale	The game draws at	Looks	Graphics card
50 %	960 x 540, stretched up	clearly blurry	much less work
75 %	1440 x 810, stretched up	a little soft	less work
100 %	1920 x 1080	normal	normal
150 %	2880 x 1620, shrunk down	smoother edges, finer detail	about twice the work
200 %	3840 x 2160, shrunk down	smoothest	about four times the work

• Above 100 % = supersampling: drawing more pixels than the screen has and shrinking them makes jagged edges ("jaggies") and shimmering smaller. It costs speed.
• Below 100 % = upscaling: drawing fewer pixels and stretching them makes the game faster, but softer. Useful on a slow laptop or on battery.

The setting takes effect when the game starts. You can change it at any time, but a running game keeps what it read at start-up: restart it to see the change.

Example: a sharper Tekken 7, step by step

1. Select Tekken in the game list and open the Game config tab.
2. Tick Write these settings when ... starts.
3. Resolution: 1920 x 1080 (your monitor's size).
4. Render scale: 150 % (supersample).
5. JConfig window: tick it and pick the monitor you play on.
6. Press Start (or Restart if the game is already running). The app writes the files, then starts the game.
7. Look at the game info overlay (Ctrl+Alt+I): if the FPS drops below 60 (Tekken runs at 60), go back to 125 %. If it stays at 60, you can try 200 %.

Quick test that it works: set 50 % and start the game once. It should look clearly blurry. If it looks the same as before, the game does not read these files: tell us (the game log has the GameConfig lines showing what was written).

To undo everything: press Restore originals, or set the render scale back to Game's own.

Which files and keys

File	Keys
<Project>/Config/DefaultEngine.ini	[SystemSettings] r.ScreenPercentage, r.Upscale.Quality (3, the sharpest scaling filter, while the render scale is set), ResX, ResY
<Project>/Config/DefaultGameUserSettings.ini	ResolutionSizeX, ResolutionSizeY, [ScalabilityGroups] sg.ResolutionQuality (at most 100: the engine caps it, so above 100 % r.ScreenPercentage does the work)
Engine/Config/Windows/WindowsEngine.ini	[SystemSettings] r.setres (Tekken 7 has 1280x720 here)
<Project>/Binaries/Win64/monitor_misc.bin	JConfig's window position and size, and its DX resolution

Before the app first changes a file it keeps a copy next to it, named <file>.wm-original. Only the keys above are changed; everything else in the files stays as it is, also your own edits. A setting put back to Game's own gets its value from that copy, and Restore originals does so for all of them and then removes the copies.

JConfig keeps its settings in monitor_misc.bin, the file its dialog reads and writes. After the app changes it, JConfig's dialog shows the new window and resolution too. Pressing OK in JConfig afterwards writes JConfig's values again; the app writes its own again on the next Start.

Tips for Tekken 7

• Window on monitor 2 at full size: Resolution 1920 x 1080, JConfig window Monitor 2.
• Sharper picture: also Render scale 150 % (or 200 % on a fast card). The window stays 1920 x 1080, so the downscaled view is not needed.
• A slow laptop: Render scale 67 % or 75 %.
• With Magpie: a Resolution below the monitor's (1280 x 720 or 1600 x 900), render scale 100 %. In window mode Tekken's window follows the resolution; one bigger than the monitor (3840 x 2160) is shrunk by Magpie into a squeezed picture. On a GTX 1650 Tekken already holds 60 FPS at 1920 x 1080 with the GPU at about 30 %, so upscaling saves nothing there: compare on the Reports tab.
• Check the game log (logs/<game>.log, lines with GameConfig) for what was written, and the Watch lines for what the game did with its window.

See also Display settings for the PC's own resolution while a game runs, Focus, mouse and hotkeys for reaching the app while Tekken holds the keyboard, and Downscaled view for supersampling games that have no render scale.