📊 Visual Aids & Technology · Lesson 1 of 8

Designing Effective Slides

Your slides are a visual companion to your voice — not a script. When a slide tries to say everything, the speaker becomes unnecessary. One idea per slide, shown simply, is the entire principle.

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Weak Slide vs Strong Slide — Same Content, Different Design

The diagram compares weak and strong slide design across three elements — title, body, and visual — using this example as the content. The weak version puts everything on the slide; the strong version puts one thing on the slide and lets the speaker say the rest.

Comparison diagram of weak vs strong slide design using the AI effectiveness topic — Same data, same topic — the strong design gives the speaker something to do. The weak design makes the speaker redundant.

💡 Tip: If the audience can understand your slide without you in the room, you have over-designed it. The slide should require the speaker to be complete.

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Worked Example: One Slide, Two Versions

Topic: 'Why most professionals will never use AI effectively.' Two versions of the same opening slide — same data, completely different effect.

Weak version vs Strong version — same content: ✗ WEAK — SLIDE TITLE: "10 Reasons Why Most Professionals Fail to Use AI Effectively" BULLETS: 72% lack training · 40% productivity gap · simple tasks only · culture blocks experimentation · prompt quality is the key [Audience reads all five in silence. Speaker waits. The room does the work.] —— ✓ STRONG — SLIDE TITLE: "Only 12% use it well." VISUAL: One bar chart — 72% (have access) vs 12% (use effectively). Nothing else. [Speaker says:] "Seventy-two percent of professionals have AI on their desktops. Only twelve percent use it effectively. That gap is not a technology problem. It is a skills problem. And it is exactly what we are going to fix today."

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The One Question to Ask Every Slide

Before moving on from any slide, ask one question. The answer tells you whether the design is right.

✓"What is the single thing this slide needs the audience to remember?" — If you cannot answer in one sentence, the slide is trying to do too much — split it or cut it
✓If the audience can read the slide without you, rewrite it — The slide shows the one thing; the speaker provides context, nuance, story, and meaning
✓Maximum 6 words in the title, no full sentences in the body — If a point needs a full sentence, it belongs in a spoken line — not on the slide

Key Takeaways

1One idea per slide — when the idea changes, the slide changes
2The slide shows the one thing; the speaker says everything else
3A weak slide makes the speaker redundant; a strong slide makes the speaker essential
4Ask: 'What is the single thing this slide must make the audience remember?' If you can't answer in one sentence, split the slide
5Maximum 6 words in the title; no full sentences in the body; minimum 24pt font

What's Next

Continue through the course in order, or jump back to review earlier lessons.

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Tailoring Language to Your Audience

The Rule of Minimalism