Here are a few more options which was not documented in example.conf in version 0.9.0:
Code:
[video]
## Open the emulator in fullscreen or windowed mode (1 = fullscreen,
## 0 = window). The default is windowed mode.
# fullscreen = 1
## Enable full-scene anti-aliasing (reduces jagged edges in menu-mode).
## Specify 2 for 2x, 4 for 4x, etc.
# fsaa = 4
[application]
## You can override the title displayed in menu mode
# title = Custom Title
## You can also override the sub-title displayed in menu mode
# sub_title = Custom Sub-Title
In the next version, you should also be able to specify aspect correction on/off in the configuration file.