Deckify is a little script-based tool that allows you to swap video configs for your games. I like to stream games to my Steam Deck as well as playing them on my 4k TV and my 1440p monitor - changing settings every time I wanted to use a different screen was a hassle - hence, Deckify!
Since there's some interest, here's how to get Deckify up 'n running:
1) Download WizApp from here.
2) Download 7-Zip Extra for Windows from here.
3) Download the default configs and artwork (Deckify.zip) from here.
4) Extract Deckify.zip wherever you like - you should have a folder called 'Deckify' and inside should be another folder called 'myfiles' - inside that is Configs.zip and some artwork.
5) Extract wizapp161.zip into 'myfiles/wizapp161' and copy WizApp.exe to 'myfiles'.
6) Extract 7za.exe from 7z-extra.7z to 'myfiles'.
'Deckify/myfiles' should now look like this:
7) Copy the batch script code below and paste it into a 'Deckify.bat' text document - save/copy that to the 'Deckify' folder (not 'myfiles').
Double-click on the batch script - if you've done everything correctly you should see the Deckify app shown at the top of this post (and a console output window) - congrats! Deckify lives! Now click on 'Cancel' to quit - we're not done yet!

Since there's some interest, here's how to get Deckify up 'n running:
1) Download WizApp from here.
2) Download 7-Zip Extra for Windows from here.
3) Download the default configs and artwork (Deckify.zip) from here.
4) Extract Deckify.zip wherever you like - you should have a folder called 'Deckify' and inside should be another folder called 'myfiles' - inside that is Configs.zip and some artwork.
5) Extract wizapp161.zip into 'myfiles/wizapp161' and copy WizApp.exe to 'myfiles'.
6) Extract 7za.exe from 7z-extra.7z to 'myfiles'.
'Deckify/myfiles' should now look like this:

7) Copy the batch script code below and paste it into a 'Deckify.bat' text document - save/copy that to the 'Deckify' folder (not 'myfiles').
Code:
@ECHO OFF
TITLE Deckify v1.1
COLOR 1F
ECHO.
ECHO Deckify v1.1 Console Output
ECHO ------- ---- ------- ------
ECHO.
REM *** Pull Steam path from Registry ***
FOR /F "usebackq tokens=2,* skip=2" %%L IN (
`reg query "HKCU\Software\Valve\Steam" /v SteamPath`
) DO SET "steampath=%%M"
SET "steampath=%steampath:/=\%"
REM *** Supported Games (9 entries max) ***
SET "game01=The Ascent"
SET "path01=%localappdata%\TheAscent\Saved\Config\WindowsNoEditor"
SET "file01=\GameUserSettings"
SET "fext01=.ini"
SET "game02=Cyberpunk 2077"
SET "path02=%localappdata%\CD Projekt Red\Cyberpunk 2077"
SET "file02=\UserSettings"
SET "fext02=.json"
SET "game03=Days Gone"
SET "path03=%localappdata%\BendGame\Saved\Config\WindowsNoEditor"
SET "file03=\GameUserSettings"
SET "fext03=.ini"
SET "game04=Doom Eternal"
SET "path04=%homedrive%%homepath%\Saved Games\id Software\DOOMEternal\base"
SET "file04=\DOOMEternalConfig"
SET "fext04=.local"
SET "game05=Dying Light 2"
SET "path05=%homedrive%%homepath%\Documents\dying light 2\out\settings"
SET "file05=\video"
SET "fext05=.scr"
SET "game06=Elden Ring"
SET "path06=%appdata%\EldenRing"
SET "file06=\GraphicsConfig"
SET "fext06=.xml"
SET "game07=Marvel's Spider-Man Remastered"
SET "path07=HKEY_CURRENT_USER\Software\Insomniac Games\Marvel's Spider-Man Remastered"
SET "file07=\Graphics"
SET "fext07=.reg"
SET "game08=Resident Evil Village"
SET "path08=%steampath%\steamapps\common\Resident Evil Village BIOHAZARD VILLAGE"
SET "file08=\config"
SET "fext08=.ini"
SET "game09=Star Wars Squadrons"
SET "path09=%homedrive%%homepath%\Documents\STAR WARS Squadrons Steam\settings"
SET "file09=\ProfileOptions_profile"
SET "fext09="
REM SET "game00=Forza Horizon 5"
REM SET "path00=%localappdata%\ForzaHorizon5\User_SteamLocalStorageDirectory\ConnectedStorage\ForzaUserConfigSelections"
REM SET "file00=\UserConfigSelections"
REM SET "fext00="
REM *** Set WizApp Variables ***
IF NOT EXIST "%myfiles%" (
IF EXIST "%~dp0myfiles" SET "myfiles=%~dp0myfiles"
)
SET "wabat=%myfiles%\wabat.bat"
IF EXIST "%wabat%" DEL /f /q "%wabat%"
"%myfiles%\7za.exe" x -aoa "%myfiles%\Configs.zip" -o"%myfiles%\Configs\" >nul
SET watitle=Deckify
SET wasig=Steam Deckify 1.1.0.0
SET "waico=%myfiles%\Deck_Logo.ico"
REM *** WizApp Start Page ***
:STARTPAGE
SET gamevar=game0
SET pathvar=path0
SET filevar=file0
SET fextvar=fext0
SET "wabmp=%myfiles%\Deck_Logo.bmp"
SET waoutnum=0
SET wainput= Deckify all supported games; ^&%game01%; ^&%game02%;^
^&%game03%; ^&%game04%; ^&%game05%; ^&%game06%; ^&%game07%; ^&%game08%; ^&%game09%
SET watext=Deckify allows you to quickly swap out PC video configs (2160 UHD/1440 QHD/1280x800 for Steam Deck).
SET watext2=~~Deckify is built using The Wizard's Apprentice by~Dion Nicolaas
SET watext3= (wizapp.sourceforge.net) and uses~7za.exe by Igor Pavlov (www.7-zip.org).
SET watext4=~~Choose a game to Deckify:
START /w "" "%myfiles%\wizapp" NOB RB
IF errorlevel 2 GOTO :FINISH
CALL "%wabat%"
IF "%waoutnum%"=="0" GOTO :CONFIGTYPE
CALL SET gamevar=%%%gamevar%%waoutnum%%%
CALL SET pathvar=%%%pathvar%%waoutnum%%%
CALL SET filevar=%%%filevar%%waoutnum%%%
CALL SET fextvar=%%%fextvar%%waoutnum%%%
REM *** Choose Config Type ***
:CONFIGTYPE
SET waoutnum=0
SET "wabmp=%myfiles%\Deck_Question.bmp"
SET watext4=~~Choose a video config for your games:
SET "wainput= Install UHD 3840 x 2160 config; Install QHD 2560 x 1440 config; Install Steam Deck config"
IF NOT "%gamevar%"=="game0" (
SET watext4=~~Choose a video config for %gamevar%:
IF EXIST "%myfiles%\Configs\%gamevar%\2160UHD*" (
SET "wainput= Install UHD 3840 x 2160 config"
IF EXIST "%myfiles%\Configs\%gamevar%\steamdeck*" SET "wainput= Install UHD 3840 x 2160 config; Install Steam Deck config"
IF EXIST "%myfiles%\Configs\%gamevar%\1440QHD*" (
SET "wainput= Install UHD 3840 x 2160 config; Install QHD 2560 x 1440 config"
IF EXIST "%myfiles%\Configs\%gamevar%\steamdeck*" SET "wainput= Install UHD 3840 x 2160 config; Install QHD 2560 x 1440 config; Install Steam Deck config" )
) ELSE (
IF EXIST "%myfiles%\Configs\%gamevar%\steamdeck*" SET "wainput= Install Steam Deck config"
IF EXIST "%myfiles%\Configs\%gamevar%\1440QHD*" (
SET "wainput= Install QHD 2560 x 1440 config"
IF EXIST "%myfiles%\Configs\%gamevar%\steamdeck*" SET "wainput= Install QHD 2560 x 1440 config; Install Steam Deck config" )
)
IF NOT EXIST "%myfiles%\Configs\%gamevar%\2160UHD*" (
IF NOT EXIST "%myfiles%\Configs\%gamevar%\1440QHD*" (
IF NOT EXIST "%myfiles%\Configs\%gamevar%\steamdeck*" (
SET "wabmp=%myfiles%\Deck_Stop.bmp"
SET watext4=~~No configs found for %gamevar%!~Click 'Finish' to quit or 'Back' to start over.
START /w "" "%myfiles%\wizapp" FINISH NOCANCEL TB
IF errorlevel 1 GOTO :STARTPAGE
IF errorlevel 0 GOTO :FINISH
))))
START /w "" "%myfiles%\wizapp" RB
IF errorlevel 2 GOTO :FINISH
IF errorlevel 1 GOTO :STARTPAGE
CALL "%wabat%"
SET "confvar=2160UHD"
IF %waoutnum%==2 SET "confvar=steamdeck"
IF %waoutnum%==0 (
IF "%wainput%"==" Install QHD 2560 x 1440 config" SET "confvar=1440QHD"
IF "%wainput%"==" Install Steam Deck config" SET "confvar=steamdeck"
IF "%wainput%"==" Install QHD 2560 x 1440 config; Install Steam Deck config" SET "confvar=1440QHD"
)
IF %waoutnum%==1 (
SET "confvar=1440QHD"
IF "%wainput%"==" Install QHD 2560 x 1440 config; Install Steam Deck config" SET "confvar=steamdeck"
)
REM *** Setup Loop/Process Configs ***
SET count=1
SET "wabmp=%myfiles%\Deck_Info.bmp"
SET watext4=~~Deckifying - please wait...
START /w "" "%myfiles%\wizapp" NOB NOCANCEL PB OPEN
IF NOT "%gamevar%"=="game0" (
IF "%fextvar%"==".reg" (
IF EXIST "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" (
REG import "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%"
)) ELSE (
IF EXIST "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" (
IF EXIST "%pathvar%" (IF EXIST "%pathvar%%filevar%%fextvar%" DEL /f /q "%pathvar%%filevar%%fextvar%")
COPY /v "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" "%pathvar%%filevar%%fextvar%"
))
START /w "" "%myfiles%\wizapp" NOB NOCANCEL PB UPDATE 100
)
IF "%gamevar%"=="game0" (
FOR /l %%G IN (1,1,9) DO (CALL :GAMELOOP "%%G")
)
TIMEOUT /t 1 /NOBREAK >nul
SET "wabmp=%myfiles%\Deck_Check.bmp"
START /w "" "%myfiles%\wizapp" NOB NOCANCEL PB CLOSE
SET watext4=~~Done! Click 'Finish' to quit or 'Back' to start over.
START /w "" "%myfiles%\wizapp" FINISH NOCANCEL TB
IF errorlevel 1 GOTO :STARTPAGE
:FINISH
IF EXIST "%myfiles%\Configs" RMDIR /s /q "%myfiles%\Configs"
IF EXIST "%wabat%" DEL /f /q "%wabat%"
EXIT
:GAMELOOP
CALL SET gamevar=%%%gamevar%%count%%%
CALL SET pathvar=%%%pathvar%%count%%%
CALL SET filevar=%%%filevar%%count%%%
CALL SET fextvar=%%%fextvar%%count%%%
IF NOT "%pathvar%"=="" (
IF "%fextvar%"==".reg" (
IF EXIST "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" (
REG import "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%"
)) ELSE (
IF EXIST "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" (
IF EXIST "%pathvar%" (IF EXIST "%pathvar%%filevar%%fextvar%" DEL /f /q "%pathvar%%filevar%%fextvar%")
COPY /v "%myfiles%\Configs\%gamevar%\%confvar%%fextvar%" "%pathvar%%filevar%%fextvar%"
)))
SET gamevar=game0
SET pathvar=path0
SET filevar=file0
SET fextvar=fext0
SET wizmult=12
SET /a wizcount+=%wizmult%
IF "%wizcount%"=="96" SET wizcount=100
START /w "" "%myfiles%\wizapp" NOB NOCANCEL PB UPDATE %wizcount%
SET /a count+=1
EXIT /b
Double-click on the batch script - if you've done everything correctly you should see the Deckify app shown at the top of this post (and a console output window) - congrats! Deckify lives! Now click on 'Cancel' to quit - we're not done yet!