DOSBox resolution: full screen, window size, clear graphics
Switching between full screen and window
To use DOSBox in full screen, press the ALT key and, while pressing the ALT key, press the Enter key. Do this again, and you return to the DOSBox window. To enhance image quality, continue reading.
Changing the DOSBox resolution and image quality
Here at DOSGamers, we like our DOS games to look clear and just like the original. As most DOS games are made for screens with a resolution of 320x240 pixels, DOSBox needs to scale the image. With default settings, DOSBox in full screen looks blurry or fuzzy. At startup, the window is also kind of small. So what did we do?
- Open the DOSBox configuration file:
- Windows 7: Press CTRL + ESC (or Start button), type in dosbox and the options file should appear in the search results, click it
- Windows 8: Press the Windows key + Q, type in dosbox and the options file should appear in the search results, click it
- Look for the [sdl] section
- Use fullscreen=true for full screen
- Use fullscreen=false for DOSBox in a window
- Change fullresolution=original to fullresolution=desktop
- When using a window, change windowresolution=original to windowresolution=1280x1024 (or use 1024x768 for a smaller window)
- Change output=surface to output=openglnb (uses graphics hardware and maintains crisp image with scaling). You might try output=ddraw if your hardware doesn't support OpenGL. In some cases ddraw also has a lower CPU load.
- Scroll down to the [render] section
- Change aspect=false to aspect=true (maintains 4:3 aspect ratio, otherwise keep on false if you like the aspect ratio of your screen, mostly 16:9 or 16:10 nowadays)
- Save the configuration file with CTRL+S (or File - Save)
- (Re)start DOSBox