How should we use visuals in a presentation without letting slides take over?
The core rule is simple: visuals should support the presenter, not compete with the presenter. Many people preparing a slide deck for a keynote presentation ask the same questions. What is too much? What is too little? What actually works? The answer is that less usually works better because crowded slides pull attention away from the speaker.
When a screen is filled with paragraphs, dense sentences, and too much information, the audience starts reading instead of listening. Because the audience can read for themselves, therefore the presenter loses connection, energy, and authority. The screen becomes the focus instead of the person delivering the message.
A better approach is minimalist visual design. Use single words, one number, a simple photograph, or a short list of bullet points. This gives the audience a fast visual cue and leaves space for the presenter to explain the meaning. The visual sets the direction, and the speaker provides the value.
Mini-summary: Presentation visuals work best when they reinforce the speaker rather than replace the speaker. Because less content creates more attention on the presenter, therefore simpler slides are usually stronger slides.
What is the best amount of text to put on a presentation slide?
The guidance here is to avoid paragraphs and even avoid full sentences when possible. Single words can be extremely powerful because they force focus. One word can frame an idea. One number can frame a result. One image can frame a story. Then the presenter talks to that word, number, or image.
This matters because audiences process visual information very quickly. If they can understand what they see almost instantly, they remain with the presenter. If they need to decode a cluttered slide, they switch away from the speaker and into private reading mode.
Bullet points can still work, but only when they remain minimalist. The goal is not to place every thought on screen. The goal is to create a prompt that supports live communication. A slide is not a document. A slide is a visual partner to spoken communication.
Mini-summary: The best amount of text is usually far less than presenters think. Because shorter text is easier to absorb, therefore the audience stays engaged with the speaker instead of drifting into reading.
What is the two-second rule for presentation slides?
The two-second rule is a practical test for slide clarity. If something appears on screen and the audience cannot see it and understand it within two seconds, then it is probably too complicated. That means the slide needs to be stripped back until the point becomes immediately clear.
This rule is useful because it forces discipline. Presenters often believe more detail is more helpful, but the opposite is usually true in live delivery. Because the audience has only a moment to interpret what is on screen, therefore the message must be instantly visible and instantly understandable.
The two-second rule also protects pacing. If the audience grasps the slide quickly, the presenter can keep momentum. If they cannot, the energy drops while people try to work out what they are seeing. Clear visuals keep rhythm, confidence, and attention moving in the right direction.
Mini-summary: The two-second rule is a speed test for comprehension. Because a live audience needs instant clarity, therefore anything that takes too long to understand should be simplified.
What is the six by six rule in presentation design?
The six by six rule is another way to keep slides minimalist. It means six words on a line and six lines on a screen. This forces compression and makes the presenter choose only the most important words.
The value of this rule is not mathematical perfection. The value is restraint. Many presentation problems begin when speakers try to place too much explanation onto the slide itself. Because that creates visual overload, therefore the audience starts reading instead of listening.
Using six by six thinking helps presenters edit aggressively. It removes clutter, sharpens the main point, and creates cleaner visual structure. Even when a slide does not follow the rule exactly, the rule still acts as a strong guide towards brevity and readability.
Mini-summary: The six by six rule is a practical discipline for reducing clutter. Because visual restraint supports listening, therefore fewer words usually produce stronger presentations.
Which fonts and text styles are easiest to read on screen?
Readable fonts and text sizes matter more than many presenters realise. A suggested standard is 44-point font for titles and 32-point font for body text. These sizes improve visibility and help the audience absorb the message quickly.
In terms of font type, sans serif fonts such as Arial are easier to read on screen. Serif fonts such as Times or Times Roman include extra decorative detail that can become distracting in a presentation setting. Because presentation slides must be read at speed and at distance, therefore simpler fonts generally perform better.
Text styling also needs discipline. All uppercase should be used very sparingly because it feels like shouting at the audience. Underline can be used, but only occasionally. Bold can help, but overuse weakens its effect. Italics are harder to read, so they should be used very modestly.
Mini-summary: Large, simple fonts improve visibility and reduce distraction. Because clear typography supports fast reading, therefore sans serif fonts and restrained styling are better for presentation slides.
When should we reveal content step by step, and when should we show it all at once?
Transitions should be used with intention. Sometimes it is effective to reveal one concept at a time. When only one idea appears on screen, the presenter can focus the audience on that one point without competing with multiple lines of content.
At other times, showing all the content at once can help because the audience can read the full structure while the presenter walks through it. The key issue is not whether one method is always right. The key issue is understanding the difference in usage and choosing the method that fits the message.
Because transitions affect attention, therefore they should serve the presenter's communication strategy. If the goal is focus, gradual reveal can work well. If the goal is orientation, full display can work well. The presenter should choose based on what helps the audience follow the message most easily.
Mini-summary: Both step-by-step reveals and full-content displays can work. Because each method serves a different communication purpose, therefore presenters should choose deliberately rather than use transitions casually.
What kinds of visuals work best in presentations?
Pictures are highly effective because they carry visual appeal and immediate meaning. A relevant photograph of people, a book, or another useful subject can be understood in about two seconds. Once the audience understands the image, they are ready for the presenter's explanation of why it matters.
Charts also have specific roles. Bar graphs are useful when the presenter wants to compare items or variables. Line charts are useful for showing change over time because audiences can quickly see whether something is rising, falling, or staying flat. Pie charts are useful for showing parts of a whole or the share of something.
The mistake comes when presenters overload the screen, especially with too many pie charts at once. Because pie charts become hard to interpret in groups, therefore they quickly lose their usefulness. The lesson is not to avoid visuals. The lesson is to match the right visual to the right purpose and keep the screen uncluttered.
Mini-summary: Pictures and charts work well when each visual has a clear job. Because different visuals explain different kinds of information, therefore presenters should choose visuals by purpose and avoid overcrowding the screen.
Which colours work best on presentation slides?
Colour choices affect visibility and contrast, but many people do not use them well. Black, blue, and green are identified as strong colours for screens. They are generally easier to see and combine effectively for contrast.
Useful combinations include black with blue and green with black. These pairings help establish readable contrast without creating unnecessary strain. In contrast, orange, grey, and especially red can be harder to use effectively. Red in particular can be difficult to see, so it should be used sparingly.
Because colour influences how easily the audience can process the screen, therefore colour decisions should be practical rather than decorative. Good colour use supports clarity. Poor colour use weakens it.
Mini-summary: The best slide colours are the ones the audience can read easily. Because clarity matters more than decoration, therefore black, blue, and green are safer choices, while red should be used with care.
Why do most presentations get visuals wrong?
The most common mistakes come from overloading the screen, ignoring readability, and forgetting that the audience should focus on the speaker first. People often use too many words, too many visual elements, too many charts, or styles that distract rather than support.
The advantage is that improvement does not require complicated design theory. It requires applying a few simple guidelines with consistency: keep slides minimalist, use the two-second rule, follow six by six thinking, choose readable fonts, use text styling sparingly, match transitions to purpose, select visuals carefully, and use colours that improve contrast.
Because very few presenters get all of this right, therefore anyone who understands these basics can stand out quickly. Better visuals do not just make slides look better. They make presenting more effective.
Mini-summary: Most visual mistakes come from complexity and distraction. Because simple guidelines solve most of those problems, therefore presenters who apply them can move ahead of the crowd.
About the Author
Dr. Greg Story, Ph.D. in Japanese Decision-Making, is President of Dale Carnegie Tokyo Training and Adjunct Professor at Griffith University. He is a two-time winner of the Dale Carnegie "One Carnegie Award" (2018, 2021) and recipient of the Griffith University Business School Outstanding Alumnus Award (2012). As a Dale Carnegie Master Trainer, Greg is certified to deliver globally across all leadership, communication, sales, and presentation programs, including Leadership Training for Results.
He has written several books, including three best-sellers — Japan Business Mastery, Japan Sales Mastery, and Japan Presentations Mastery — along with Japan Leadership Mastery and How to Stop Wasting Money on Training. His works have also been translated into Japanese, including Za Eigyō (ザ営業), Purezen no Tatsujin (プレゼンの達人), Torēningu de Okane o Muda ni Suru no wa Yamemashō (トレーニングでお金を無駄にするのはやめましょう), and Gendaiban "Hito o Ugokasu" Rīdā (現代版「人を動かす」リーダー).
