Make sure letter size is adequate for reproduction on video. Dark or out-of focus slides will look significantly worse on television. Computer Graphics and Software Converting computer- generated graphics to a TV signal is still a crude process and much of the screen resolution can be lost. All of the above rules apply, especially the need for reasonabl e contrast between lettering and background. Never use patters, screens or anything with a line weight of less that 4 pixels, or severe flicker will occur.
Some systems do better with light letters on dark background while others prefer dark on light.
Therefore, computer graphics should be tested before use, as should most of your visuals.