Advanced OpenGL Settings
The Advanced OpenGL Settings dialog (which can be accessed from the Display Preferences dialog) can be used, experimentally, to try to resolve various strange graphics issues, such as a blank area appearing where the grid of a sequence should be, or the grid appearing offset from where it should be (e.g. the rows of the grid do not properly line up with the channel buttons).
However, this is not recommended. Typically, such issues can be better resolved in other ways, such as updating your computer's graphics card's drivers. Some people have also had luck resolving such issues by doing things such as disabling advanced Windows themes (such as "Aero"), by disabling "hardware acceleration" in their graphics card's settings, or by changing their Windows display settings from 32 bit color to 16 bit color.
The Advanced OpenGL Settings dialog can be used as another option to these methods, but, again, it is not suggested. Changing the settings using this dialog could conceivably cause other strange graphics issues, or cause the Sequence Editor to run slowly.
The dialog allows you to choose between two options: "Use the default Windows pixel format" (which is recommended), and "Use a specific pixel format". If you chose to use a specific pixel format, then you can choose it from the dropdown list immediately below that option.
The list of pixel formats does not include all possible pixel formats that are available on your computer; instead, it only includes those that seem to meet the requirements of the Light-O-Rama Sequence Editor. It also includes brief descriptions of each of them; the meanings of these descriptions are beyond the scope of this help file. If you would like to know what they mean, please consult OpenGL documentation.
In either case, whether you choose to use the default Windows pixel format or a specific pixel format, a preview picture will be displayed at the bottom of the dialog, drawn using that pixel format. If the picture does not look as its description says it should, then the chosen pixel format will probably not work correctly on your computer.
Some pixel formats may be more efficient than others, so even if a pixel format seems to work, it may cause the Sequence Editor to run more slowly than normal. So, if you choose to change the pixel format in use, and the Sequence Editor then seems choppy or slow, you may want to try another pixel format.
After you choose a pixel format and exit the dialog, you may have to close the Sequence Editor and restart it before your changes will fully take effect.
The Advanced OpenGL Settings dialog