tools-only Presentation & Slide Design Guide
Core Philosophy
Slides support the speaker — they don't replace the speaker.
Audience cannot read AND listen simultaneously. Choose one.
Fundamental Rules
One Idea Per Slide
Each slide = single focused message. Benefits:
- Focus — Easier for audience to concentrate
- Memory — Key messages retained longer
- Learning — Avoids cognitive overload
Text Amount Rules
| Rule | Guideline |
|---|---|
| Rule of 4 | Max 4 bullets, 4 words each |
| 6×6 Rule | Max 6 lines, 6 words per line |
| 7×7 Rule | Max 7 lines, 7 words per line |
Best practice: Use visuals, not text walls.
Font Size Guidelines
By Presentation Context
| Context | Titles | Body Text | Captions |
|---|---|---|---|
| Large room (100+ people) | 60pt+ | 40pt+ | 24pt+ |
| Medium room (20-50 people) | 48pt+ | 36pt+ | 20pt+ |
| Small room/Virtual | 44pt+ | 32pt+ | 18pt+ |
| Leave-behind document | 36pt+ | 20pt+ | 12pt+ |
Distance Rule
No universal answer — depends on:
- Room size
- Screen size
- Distance to furthest viewer
Test: Can the back row read it?
Visual Hierarchy in Slides
Techniques
- Size — Headlines larger than body
- Color — Accent color for emphasis
- Position — Top-left gets attention first (Z-pattern)
- White space — Isolation = importance
- Contrast — Stand out from background
Reading Patterns
Z-Pattern (most slides):
1 ─────────────→ 2
↘
3 ─────────────→ 4
Place key message at position 1 or 4 (start/end points).
Slide Types & Templates
Title Slide
┌───────────────────────────────────┐
│ │
│ PRESENTATION TITLE │
│ ═══════════════════ │
│ Subtitle / Date │
│ │
│ Logo │
└───────────────────────────────────┘
Content Slide
┌───────────────────────────────────┐
│ Slide Title │
│ ════════════ │
│ │
│ • Point one │
│ • Point two │
│ • Point three │
│ │
└───────────────────────────────────┘
Two-Column
┌───────────────────────────────────┐
│ Slide Title │
│ │
│ Left Column │ Right Column │
│ • Item 1 │ [Image/Chart] │
│ • Item 2 │ │
│ • Item 3 │ │
└───────────────────────────────────┘
Data/Chart Slide
┌───────────────────────────────────┐
│ Key Finding (One Sentence) │
│ │
│ ┌────────────────────┐ │
│ │ │ │
│ │ [CHART/GRAPH] │ │
│ │ │ │
│ └────────────────────┘ │
│ │
│ Source: Citation │
└───────────────────────────────────┘
Design Best Practices
Do's
- One message per slide
- High contrast (4.5:1 minimum)
- Consistent fonts/colors throughout
- Use visuals > text for data
- Leave breathing room (white space)
- Test on target screen/projector
Don'ts
- Text walls
- Reading slides aloud
- Too many animations
- Inconsistent styling
- Low contrast text
- Tiny fonts
2025 Trends
| Trend | Description | When to Use |
|---|---|---|
| Dark mode | Dark bg + neon/bright text | Modern, tech, creative |
| Minimalism | One accent color, lots of space | Corporate, clean |
| Gradients | Subtle color transitions | Creative, dynamic |
| Motion | Micro-animations | Virtual presentations |
| Magazine layouts | Asymmetric, editorial | Creative agencies |
| Mobile-first | Vertical, large text | Hybrid meetings |
Color for Slides
Background Options
| Type | Use Case |
|---|---|
| White/Light | Classic, readable, print-friendly |
| Dark/Black | Modern, reduces eye strain, virtual |
| Brand color | Consistency, recognition |
Text on Background
| Background | Text Color |
|---|---|
| White | Black/Dark gray |
| Black | White/Light colors |
| Dark blue | White/Yellow |
| Light gray | Black/Navy |
Rule: Always check contrast ratio (4.5:1+)
Data Visualization
Chart Selection
| Data Type | Best Chart |
|---|---|
| Comparison | Bar chart |
| Trend over time | Line chart |
| Part of whole | Pie chart (max 5 segments) |
| Relationship | Scatter plot |
| Process | Flowchart |
Data Presentation Tips
- Simplify — Remove unnecessary gridlines, labels
- Highlight — Use color to emphasize key data point
- Title = Insight — "Sales grew 40%" not "Sales chart"
- Source — Always cite data source
Animation Guidelines
Use Sparingly
- Reveal content progressively (builds)
- Guide attention
- Show process/sequence
Avoid
- Flashy transitions between slides
- Multiple animations per slide
- Animations that distract from message
Safe Animations
- Fade in
- Appear
- Fly in (one direction)
- Simple morph (PowerPoint)
Cognitive Load Considerations
Dual-Channel Theory
Humans process visual and auditory separately. Don't:
- Show text AND speak the same words
- Require reading while listening
Do Instead
- Show image/chart → explain verbally
- Show key word → elaborate verbally
- Use progressive reveal
Working Memory Limits
- 4±1 items can be held at once
- Chunk information
- Use hierarchy to prioritize
Presentation Checklist
Before Presenting
- All text readable from back of room?
- Consistent styling throughout?
- One idea per slide?
- Data visualized, not tabled?
- Animations purposeful and minimal?
- Tested on actual screen/projector?
- Backup copy available?
Design Quality
- High contrast (WCAG AA)?
- Max 2-3 fonts?
- Max 3-4 colors?
- Aligned to grid?
- White space adequate?
- Key message obvious?
Resources
- Research: Ten Simple Rules for Effective Slides
- Contrast Checker: WebAIM
- Design Trends: 24slides