--- title: "Slide design without jargon: one idea per slide" source: https://www.taim.io/public-speaking/slide-design-without-jargon published: Sat May 09 2026 10:51:11 GMT+0000 (Coordinated Universal Time) updated: Thu Jun 04 2026 17:17:21 GMT+0000 (Coordinated Universal Time) description: "Most slides are built like documents — dense paragraphs, multi-level bullet lists, charts that double as wall charts. They fight the talk instead of supporting it. Good slides are the opposite: large, simple, and structured around a single " --- # Slide design without jargon: one idea per slide Most slides are built like documents — dense paragraphs, multi-level bullet lists, charts that double as wall charts. They fight the talk instead of supporting it. Good slides are the opposite: large, simple, and structured around a single idea per slide. The design rules are short, and they don't require any taste you don't already have. Most slides are built like documents — dense paragraphs, multi-level bullet lists, charts that double as wall charts. They fight the talk instead of supporting it. Good slides are the opposite: large, simple, and structured around a single idea per slide. The design rules are short, and they don't require any taste you don't already have. ## What you'll learn - Why one idea per slide is the only design rule that consistently matters - How to use type, space, and contrast without studying design - When a slide should be replaced by no slide at all ## One idea per slide If you remember one slide design rule, make it this: every slide should communicate one idea, and that idea should be readable from the back of the room in three seconds. In practice, that means: - One headline statement per slide. Not a topic — a *statement*. *"Loft insulation pays back in four years"* beats *"Insulation overview."* - A single supporting image, chart, or short list. If you have two charts, you have two slides. - Body text large enough to read from the back row — typically 28pt minimum, often more. - White space treated as a design element, not as wasted real estate. The instinct to cram more onto a slide is almost always a sign that the talk's structure is doing too much work per minute. If a slide needs three points, the talk probably needs three slides. ## Type, space, and contrast — the only three knobs you need You don't need to study design to make slides that work. You need three knobs. **Type.** Pick one sans-serif typeface for headlines, one for body. Stop. The default options in Keynote, Google Slides, and PowerPoint all include one or two genuinely good typefaces — Inter, Helvetica, Source Sans, Roboto. Resist the urge to mix four fonts. Resist the urge to use Comic Sans, Papyrus, or any decorative font. **Space.** Leave a generous margin around every slide. The natural impulse is to fill the slide; the better impulse is to use less than 60% of the canvas. White space gives the eye somewhere to land and makes the headline feel deliberate. **Contrast.** Dark text on a light background, or light text on a dark background. Not light text on a light background. Not three colours of similar weight competing for attention. One accent colour for emphasis, used sparingly — typically the brand or theme accent — and the rest in neutral. That's the entire design system most talks need. ## When the right slide is no slide The slides most worth removing are the ones that exist out of habit: - **The agenda slide.** The audience knows roughly what a 30-minute talk on this topic will contain. The agenda buys you nothing and burns the first two minutes. - **The bio slide.** Your introduction by the host, plus a one-line credibility cue in the talk itself, is enough. - **The "any questions?" slide.** Don't end on this. End on your land. Take questions after. - **The thank-you slide.** Your land is the thank-you. A standalone "thank you" slide just signals that the talk is over and that you've run out of structure. When a section of a talk is mostly you speaking and gesturing, sometimes the best slide is a single image, or a black slide, or no slide at all. Black slides during stories work brilliantly — the audience's eyes come back to your face, where the connection lives. ### Quick reference #### One idea per slide If a slide has two ideas, it's actually two slides. #### Type One headline font, one body font. 28pt minimum body text. #### Space Use less than 60% of the canvas. White space is design. #### Contrast Dark on light or light on dark. One accent colour. #### Cut these slides Agenda, bio, "any questions?", standalone "thank you." #### Black slides During stories or transitions, no slide is sometimes the best slide. ### Common questions #### What about templates? A clean default template is fine. Avoid heavily branded corporate templates with chrome on every slide — the chrome eats your space and competes with the content. If your company has a strict template, strip it down to the minimum the brand team will tolerate. #### How many slides for a 30-minute talk? Anywhere from 15 to 60 is normal. Slide count is a poor proxy for talk quality — what matters is one idea per slide. A 30-minute talk with 50 simple slides can flow beautifully; one with 12 dense slides can drag. #### Should I include speaker notes? Yes — and don't read them in the room. Speaker notes are for rehearsal and for sharing the deck after. The slide should stand without them; the notes should add the parts you said out loud. #### How do I handle data-heavy slides? One chart per slide. Highlight the single number or trend that matters by colour or annotation. If the audience needs the full table, send it after the talk — don't flash a 30-row spreadsheet in the room. ### Bottom line Good slides communicate one idea each, large enough to read from the back row, with disciplined use of type, space, and contrast. Cut the agenda, the bio, and the thank-you slides. When the moment is yours, sometimes the right slide is no slide. ### Next steps - On your next deck, find every slide with two or more ideas and split each into two simpler slides. - Strip your default corporate template down to its barest version. Save it as a personal template. - Try one black slide during the story portion of your next talk. Note the difference in audience eye contact.