Unless the purpose of the paper is to examine this technology, it is best mentioned to the minimum extent necessary to maintain an unbroken logical development of the theme of the paper. Legibility will be increased if there are contrasts in brightness and tone between illustrations and backgrounds. Color combinations that increase visibility include white letters on medium blue, or black on medium yellow. Also, yellow on a darker blue background is nice. Never use black letters on a dark background.
Slides look a lot different on the computer screen than they do when they are projected.
Slides should support the verbal text and not merely display numbers generated in the study. Conversely, the verbal text should lay a proper foundation for each slide. As each slide is shown, it is useful to give the audience a brief opportunity to become oriented before proceeding. Ideas developed in the paper and supported by the slides should flow smoothly in a logical sequence, without wandering to irrelevant asides or bogging down in detail. Everything presented verbally or visually should have a clear role in support of the central theses of the paper.