Kobi-K: There should be a link to a Configuration App (Launch Settings) where you can change all the settings.
That app is located in the game's directory and the link is usually called: DOSBox Configuration.lnk
The file itself should be in the DOSBOX subdirectory and is called: GOGDOSConfig.exe

You can also edit the game's DOSBox Configuration file (*.conf) which is located in the game's
directory. Here's an example of my preffered settings:

[sdl]
fullscreen=true
fulldouble=false
fullresolution=0x0
windowresolution=800x600
output=openglnb

[render]
aspect=true
scaler=none

* fullresolution=0x0 means that it'll run on your desktop resolution. GOG usually sets this to Original
which means a 320x200 resolution.
windowresolution= Choose whatever standard 4:3 resolution you want.
output=openglnb With this option the game will run on OpenGL without Bilinear Filtering. If you want,
you can also use opengl (with Bilinear Filtering). There are other output options (you can read it in the
.conf file) but OpenGL has the best performance.
aspect=true This forces the game to keep the proper 4:3 aspect ratio.

Kobi-K: Maybe you should try a window resolution of 1440x1080 with aspect=true,
or a window resolution of 1920x1080 with aspect=false.

EATERoftheDEAD: Thank you, that seems to have done the trick as well as can be expected. I forgot the old games ran in a 4:3 aspect ratio which I think is perhaps why changing the window resolution wasn't working.

PixelBoy: Aspect correction doesn't have anything to do with 4:3 vs. widescreen issue, it's about old games having different pixel proportions than newer games.

http://www.dosbox.com/wiki/Dosbox.conf#aspect_.3D_true_.7C_false

Kobi-K: There should be a link to a Configuration App (Launch Settings) where you can change all the settings.
That app is located in the game's directory and the link is usually called: DOSBox Configuration.lnk
The file itself should be in the DOSBOX subdirectory and is called: GOGDOSConfig.exe

You can also edit the game's DOSBox Configuration file (*.conf) which is located in the game's
directory. Here's an example of my preffered settings:

[sdl]
fullscreen=true
fulldouble=false
fullresolution=0x0
windowresolution=800x600
output=openglnb

[render]
aspect=true
scaler=none

* fullresolution=0x0 means that it'll run on your desktop resolution. GOG usually sets this to Original
which means a 320x200 resolution.
windowresolution= Choose whatever standard 4:3 resolution you want.
output=openglnb With this option the game will run on OpenGL without Bilinear Filtering. If you want,
you can also use opengl (with Bilinear Filtering). There are other output options (you can read it in the
.conf file) but OpenGL has the best performance.
aspect=true This forces the game to keep the proper 4:3 aspect ratio.

Boonefab52: Has anyone come up with a step by step guide for those individuals not comfortable or not knowledgeable of the directory, root system of programs, or even the app used to make the changes?

EATERoftheDEAD: I'm having some difficulty getting DOSBox to display my game the way I would like and my Google-fu is failing me.

Details:

I am a Twitch streamer and I'm trying to play King's Quest on Windows 10 with screen resolution of 1920x1080 (I don't know if that matters). When I launch the game it defaults to full screen mode, which prevents me from using OBS on my other monitor. I usually run games in windowed mode for this reason (Diablo III for example). When I run this in windowed mode the window is really small. I tried the fixes for DOSBox found online but can't seem to get into the program to apply the fixes for screen size.

All I would like to do is change the size of the window when the game is running. If I can't make it fill the screen, that is fine, just so long as I can get it nice and big so it doesn't look terrible on stream.
Any help is greatly appreciated and thank you.

Boonefab52: Has anyone come up with a step by step guide for those individuals not comfortable or not knowledgeable of the directory, root system of programs, or even the app used to make the changes?

Boonefab52: Has anyone come up with a step by step guide for those individuals not comfortable or not knowledgeable of the directory, root system of programs, or even the app used to make the changes?

rtcvb32: Considering they are text files, they are hard to go wrong with.

But more likely just downloading a config file that is better suited would be better. That or a script that will update it as a bulk; like using sed packed with a bat file. though if i do ahk i can pack it as a single exe ready to run...

Though with the above example, I'd take off fullscreen first, and go back to fullscreen only when all other issues were solved. Also for some reason i see a ton of scalers set to hq2x/hq3x rather than normal2x/normal3x. (HQ does something similar to super2xsai but uses a lot of cpu computation and isn't worth it in my mind).

Boonefab52: Has anyone come up with a step by step guide for those individuals not comfortable or not knowledgeable of the directory, root system of programs, or even the app used to make the changes?