PowerPoint Design Guide for Scientific Presentations

PowerPoint Design Guide for Scientific Presentations

Overview

This guide provides comprehensive instructions for creating professional scientific presentations using PowerPoint, with emphasis on integration with the pptx skill for programmatic creation and best practices for scientific content.

CRITICAL: Avoid dry, text-heavy presentations. Scientific slides should be:

• Visually engaging: High-quality images, figures, diagrams on EVERY slide
• Research-backed: Citations from research-lookup for credibility (8-15 papers minimum)
• Modern design: Contemporary color palettes, not default themes
• Minimal text: 3-4 bullets with 4-6 words each, visuals do the talking
• Professional polish: Consistent but varied layouts, generous white space

Anti-Pattern Warning: All-bullet-point slides with black text on white background = instant boredom and forgotten science.

Using the PPTX Skill

Reference

For complete technical documentation on PowerPoint creation, refer to:

• Main documentation: document-skills/pptx/SKILL.md
• HTML to PowerPoint workflow: Detailed in pptx/html2pptx.md
• OOXML editing: For advanced editing in pptx/ooxml.md

Two Approaches to PowerPoint Creation

1. Programmatic Creation (html2pptx)

Best for: Creating presentations from scratch with custom designs and data visualizations.

Workflow:

1. Read document-skills/pptx/SKILL.md completely
2. Design slides in HTML with proper dimensions (720pt × 405pt for 16:9)
3. Create JavaScript file using html2pptx() function
4. Add charts and tables using PptxGenJS API
5. Generate thumbnails and validate visually
6. Iterate based on visual inspection

Example Structure:

const pptx = new PptxGenJS();

// Add title slide
const slide1 = pptx.addSlide();
slide1.addText("Your Title", {
  x: 1, y: 2, w: 8, h: 1,
  fontSize: 44, bold: true, align: "center"
});

// Add content slide with figure
const slide2 = pptx.addSlide();
slide2.addText("Results", { x: 0.5, y: 0.5, fontSize: 32 });
slide2.addImage({ path: "figure.png", x: 1, y: 1.5, w: 8, h: 4 });

pptx.writeFile({ fileName: "presentation.pptx" });

2. Template-Based Creation

Best for: Using existing PowerPoint templates or editing existing presentations.

Workflow:

1. Start with template.pptx
2. Use scripts/rearrange.py to duplicate/reorder slides
3. Use scripts/inventory.py to extract text
4. Generate replacement text JSON
5. Use scripts/replace.py to update content
6. Validate with thumbnail grids

Key Scripts:

• rearrange.py: Duplicate and reorder slides
• inventory.py: Extract all text shapes
• replace.py: Apply text replacements
• thumbnail.py: Visual validation

Design Principles for Scientific Presentations

1. Layout and Structure

Slide Master Setup:

• Create consistent master slides
• Define 4-5 layout types (title, content, figure, two-column, closing)
• Set default fonts, colors, and spacing
• Include placeholders for logos and footers

Standard Layouts:

Title Slide:

┌─────────────────────────┐
│                         │
│   Presentation Title    │
│   Your Name             │
│   Institution           │
│   Date / Conference     │
│                         │
└─────────────────────────┘

Content Slide:

┌─────────────────────────┐
│ Slide Title             │
├─────────────────────────┤
│ • Bullet point 1        │
│ • Bullet point 2        │
│ • Bullet point 3        │
│                         │
│ [Optional figure]       │
└─────────────────────────┘

Two-Column Slide:

┌─────────────────────────┐
│ Slide Title             │
├───────────┬─────────────┤
│           │             │
│  Text     │   Figure    │
│  Content  │   or        │
│           │   Data      │
└───────────┴─────────────┘

Full-Figure Slide:

┌─────────────────────────┐
│ Figure Title (small)    │
├─────────────────────────┤
│                         │
│    Large Figure or      │
│    Visualization        │
│                         │
└─────────────────────────┘

2. Typography

Font Selection:

• Primary: Sans-serif (Arial, Calibri, Helvetica)
• Alternative: Verdana, Tahoma, Trebuchet MS
• Avoid: Serif fonts (harder to read on screens), decorative fonts

Font Sizes:

• Title slide title: 44-54pt
• Slide titles: 32-40pt
• Body text: 24-28pt (minimum 18pt)
• Captions: 16-20pt
• Footer: 10-12pt

Text Formatting:

• Bold: For emphasis (use sparingly)
• Color: For highlighting (consistent meaning)
• Size: For hierarchy
• Alignment: Left for body, center for titles

The 6×6 Rule:

• Maximum 6 bullet points per slide
• Maximum 6 words per bullet
• Better: 3-4 bullets with 4-8 words each

3. Color Schemes

Selecting Colors:

Consider your subject matter and audience:

• Academic/Professional: Navy blue, gray, white with minimal accent
• Biomedical: Blue and green tones (avoid red-green combinations)
• Technology: Modern colors (teal, orange, purple)
• Clinical: Conservative (blue, gray, subdued greens)

Example Palettes:

Classic Scientific:

• Background: White (#FFFFFF)
• Title: Navy (#1C3D5A)
• Text: Dark gray (#2D3748)
• Accent: Orange (#E67E22)

Modern Research:

• Background: Light gray (#F7FAFC)
• Title: Teal (#0A9396)
• Text: Charcoal (#2C2C2C)
• Accent: Coral (#EE6C4D)

High Contrast (for large venues):

• Background: White (#FFFFFF)
• Title: Black (#000000)
• Text: Dark gray (#1A1A1A)
• Accent: Bright blue (#0066CC)

Accessibility Guidelines:

• Minimum contrast ratio: 4.5:1 (body text)
• Preferred contrast ratio: 7:1 (AAA standard)
• Avoid red-green combinations (8% of men are color-blind)
• Use patterns or shapes in addition to color for data

4. Visual Elements

Figures and Images:

• Resolution: Minimum 300 DPI for print, 150 DPI for projection
• Format: PNG for screenshots, PDF/SVG for vector graphics
• Size: Large enough to be readable from back of room
• Placement: Center or use two-column layout

Data Visualizations:

• Simplify from journal figures (fewer panels, larger text)
• Font sizes: 18-24pt for axis labels
• Line widths: 2-4pt thickness
• Colors: High contrast, color-blind safe
• Labels: Direct labeling preferred over legends

Icons and Shapes:

• Use for visual interest and organization
• Consistent style (all outline or all filled)
• Size appropriately (not too large or small)
• Limit colors (match theme)

5. Animations and Transitions

When to Use:

• ✅ Progressive disclosure of bullet points
• ✅ Building complex figures incrementally
• ✅ Emphasizing key findings
• ✅ Showing process steps

When to Avoid:

• ❌ Decoration or entertainment
• ❌ Every single slide
• ❌ Distracting effects (fly in, bounce, spin)

Recommended Animations:

• Appear: Clean, professional
• Fade: Subtle transition
• Wipe: Directional reveal
• Duration: Fast (0.2-0.3 seconds)
• Trigger: On click (not automatic)

Slide Transitions:

• Use consistent transition throughout (or none)
• Recommended: None, Fade, or Push
• Avoid: 3D rotations, complex effects
• Duration: Very fast (0.3-0.5 seconds)

Creating Presentations with PPTX Skill

Design-First Workflow

Step 0: Choose Modern Color Palette Based on Topic

CRITICAL: Select colors that reflect your subject matter, not generic defaults.

Topic-Based Palette Examples:

• Biotechnology/Life Sciences: Teal (#0A9396), Coral (#EE6C4D), Cream (#F4F1DE)
• Neuroscience/Brain Research: Deep Purple (#722880), Magenta (#D72D51), White
• Machine Learning/AI: Bold Red (#E74C3C), Orange (#F39C12), Dark Gray (#2C2C2C)
• Physics/Engineering: Navy (#1C3D5A), Orange (#E67E22), Light Gray (#F7FAFC)
• Medicine/Healthcare: Teal (#5EA8A7), Coral (#FE4447), White (#FFFFFF)
• Environmental Science: Sage (#87A96B), Terracotta (#E07A5F), Cream (#F4F1DE)

See full palette options in pptx skill SKILL.md (lines 76-94).

Step 1: Plan Design System (With Modern Palette)

// Define design constants with MODERN colors (not defaults)
const DESIGN = {
  colors: {
    primary: "0A9396",    // Teal (modern, engaging)
    accent: "EE6C4D",     // Coral (attention-grabbing)
    text: "2C2C2C",       // Charcoal (readable)
    background: "FFFFFF"  // White (clean)
  },
  fonts: {
    title: { size: 40, bold: true, face: "Arial" },
    heading: { size: 28, bold: true, face: "Arial" },
    body: { size: 24, face: "Arial" },
    caption: { size: 16, face: "Arial" }
  },
  layout: {
    margin: 0.5,
    titleY: 0.5,
    contentY: 1.5
  }
};

Step 2: Create Reusable Functions

function addTitleSlide(pptx, title, subtitle, author) {
  const slide = pptx.addSlide();
  slide.background = { color: DESIGN.colors.primary };
  
  slide.addText(title, {
    x: 1, y: 2, w: 8, h: 1,
    fontSize: 44, bold: true, color: "FFFFFF",
    align: "center"
  });
  
  slide.addText(subtitle, {
    x: 1, y: 3.2, w: 8, h: 0.5,
    fontSize: 24, color: "FFFFFF",
    align: "center"
  });
  
  slide.addText(author, {
    x: 1, y: 4, w: 8, h: 0.4,
    fontSize: 18, color: "FFFFFF",
    align: "center"
  });
  
  return slide;
}

function addContentSlide(pptx, title, bullets) {
  const slide = pptx.addSlide();
  
  slide.addText(title, {
    x: DESIGN.layout.margin,
    y: DESIGN.layout.titleY,
    w: 9,
    h: 0.5,
    ...DESIGN.fonts.heading,
    color: DESIGN.colors.primary
  });
  
  slide.addText(bullets, {
    x: DESIGN.layout.margin,
    y: DESIGN.layout.contentY,
    w: 9,
    h: 3,
    ...DESIGN.fonts.body,
    bullet: true
  });
  
  return slide;
}

Step 3: Build Presentation (Visual-First Approach)

const pptx = new PptxGenJS();
pptx.layout = "LAYOUT_16x9";

// Title slide with background image or color block
const titleSlide = pptx.addSlide();
titleSlide.background = { color: DESIGN.colors.primary }; // Bold color background
addTitleSlide(
  pptx,
  "Research Title",
  "Subtitle or Conference Name",
  "Your Name • Institution • Date"
);

// Introduction with image/icon
const introSlide = pptx.addSlide();
introSlide.addImage({
  path: "concept_image.png",  // Visual representation of concept
  x: 5, y: 1.5, w: 4, h: 3
});
introSlide.addText("Background", { x: 0.5, y: 0.5, fontSize: 36, bold: true });
introSlide.addText([
  "Key context point 1 (AuthorA, 2023)",
  "Key context point 2 (AuthorB, 2022)",
  "Research gap identified (AuthorC, 2021)"
], {
  x: 0.5, y: 1.5, w: 4, h: 2,
  fontSize: 24, bullet: true
});

// Results slide - FIGURE DOMINATES
const resultsSlide = pptx.addSlide();
resultsSlide.addText("Main Finding", { x: 0.5, y: 0.5, fontSize: 32, bold: true });
resultsSlide.addImage({
  path: "results_figure.png",  // Large, clear figure
  x: 0.5, y: 1.5, w: 9, h: 4   // Nearly full slide
});
// Minimal text annotation only
resultsSlide.addText("34% improvement (p < 0.001)", {
  x: 7, y: 1, fontSize: 20, color: DESIGN.colors.accent, bold: true
});

// Save
pptx.writeFile({ fileName: "presentation.pptx" });

Key Changes from Dry Presentations:

• Title slide uses bold background color (not plain white)
• Introduction includes relevant image (not just bullets)
• Results slide is figure-dominated (not text-dominated)
• Citations included in bullets for research context
• Text is minimal and supporting, visuals are primary

Adding Scientific Content

Equations (as images):

// Render equation as PNG first (using LaTeX or online tool)
// Then add to slide
slide.addImage({
  path: "equation.png",
  x: 2, y: 3, w: 6, h: 1
});

Tables:

slide.addTable([
  [
    { text: "Method", options: { bold: true } },
    { text: "Accuracy", options: { bold: true } },
    { text: "Time (s)", options: { bold: true } }
  ],
  ["Method A", "0.85", "10"],
  ["Method B", "0.92", "25"],
  ["Method C", "0.88", "15"]
], {
  x: 2, y: 2, w: 6,
  fontSize: 20,
  border: { pt: 1, color: "888888" },
  fill: { color: "F5F5F5" }
});

Charts:

// Bar chart
slide.addChart(pptx.ChartType.bar, [
  {
    name: "Control",
    labels: ["Metric 1", "Metric 2", "Metric 3"],
    values: [45, 67, 82]
  },
  {
    name: "Treatment",
    labels: ["Metric 1", "Metric 2", "Metric 3"],
    values: [52, 78, 91]
  }
], {
  x: 1, y: 1.5, w: 8, h: 4,
  chartColors: [DESIGN.colors.primary, DESIGN.colors.accent],
  showTitle: false,
  showLegend: true,
  fontSize: 18
});

Visual Validation Workflow

Generate Thumbnails

After creating presentation:

# Create thumbnail grid for quick review
python scripts/thumbnail.py presentation.pptx review/thumbnails --cols 4

# Or for individual slides
python scripts/thumbnail.py presentation.pptx review/slide

Inspection Checklist

For each slide, check:

• Text readable (not cut off or too small)
• No element overlap
• Consistent colors and fonts
• Adequate white space
• Figures clear and properly sized
• Alignment correct

Common Issues

Text Overflow:

• Reduce font size or text length
• Increase text box size
• Split into multiple slides

Element Overlap:

• Use two-column layout
• Reduce element sizes
• Adjust positioning

Poor Contrast:

• Choose higher contrast colors
• Use dark text on light background
• Test with contrast checker

Templates and Examples

Starting from Template

If you have an existing template:

1. Extract template structure:

python scripts/inventory.py template.pptx inventory.json

2. Create thumbnail grid:

python scripts/thumbnail.py template.pptx template_review

3. Analyze layouts and document which slides to use

4. Rearrange slides:

python scripts/rearrange.py template.pptx working.pptx 0,5,5,12,18,22

5. Replace content:

python scripts/replace.py working.pptx replacements.json output.pptx

Best Practices Summary

Do's (Make Presentations Engaging)

• ✅ Use research-lookup to find 8-15 papers for citations
• ✅ Add HIGH-QUALITY visuals to EVERY slide (figures, images, diagrams, icons)
• ✅ Choose MODERN color palette reflecting your topic (not defaults)
• ✅ Keep text MINIMAL (3-4 bullets, 4-6 words each)
• ✅ Use LARGE fonts (24-28pt body, 36-44pt titles)
• ✅ Vary slide layouts (full-figure, two-column, visual overlays)
• ✅ Maintain high contrast (7:1 preferred)
• ✅ Generous white space (40-50% of slide)
• ✅ Cite papers in intro and discussion (establish credibility)
• ✅ Test readability from distance
• ✅ Validate visually before presenting

Don'ts (Avoid Dry Presentations)

• ❌ Don't create text-only slides (add visuals to EVERY slide)
• ❌ Don't use default themes unchanged (customize for your topic)
• ❌ Don't have all bullet-point slides (vary layouts)
• ❌ Don't skip research-lookup (presentations need citations too)
• ❌ Don't cram too much text on one slide
• ❌ Don't use tiny fonts (<24pt for body)
• ❌ Don't rely solely on color
• ❌ Don't use complex animations
• ❌ Don't mix too many font styles
• ❌ Don't ignore accessibility
• ❌ Don't skip visual validation

Accessibility Considerations

Color Contrast:

• Use WebAIM contrast checker
• Minimum 4.5:1 for normal text
• Preferred 7:1 for optimal readability

Color Blindness:

• Test with Coblis simulator
• Use patterns/shapes with colors
• Avoid red-green combinations

Readability:

• Sans-serif fonts only
• Minimum 18pt, prefer 24pt+
• Clear visual hierarchy
• Adequate spacing

Integration with Other Skills

With Scientific Writing:

• Convert paper content to slides
• Simplify dense text
• Extract key findings
• Create visual abstracts

With Data Visualization:

• Simplify journal figures
• Recreate with larger labels
• Use progressive disclosure
• Emphasize key results

With Research Lookup:

• Find relevant papers
• Extract key citations
• Build background context
• Support claims with evidence

Resources

PowerPoint Tutorials:

• Microsoft PowerPoint documentation
• PowerPoint design templates
• Scientific presentation examples

Design Tools:

• Color palette generators (Coolors.co)
• Contrast checkers (WebAIM)
• Icon libraries (Noun Project)
• Image editing (PowerPoint built-in, external tools)

PPTX Skill Documentation:

• document-skills/pptx/SKILL.md: Main documentation
• document-skills/pptx/html2pptx.md: HTML to PPTX workflow
• document-skills/pptx/ooxml.md: Advanced editing
• document-skills/pptx/scripts/: Utility scripts

Quick Reference

Common Slide Dimensions

• 16:9 aspect ratio: 10" × 5.625" (720pt × 405pt)
• 4:3 aspect ratio: 10" × 7.5" (720pt × 540pt)

Measurement Units

• PowerPoint uses inches
• 72 points = 1 inch
• Position (x, y) from top-left corner
• Size (w, h) for width and height

Font Size Guidelines

Color Usage

• Backgrounds: White or very light colors
• Text: Dark (black/dark gray) on light, or white on dark
• Accents: One or two accent colors max
• Data: Color-blind safe palettes (blue/orange)

Troubleshooting

Problem: Text appears cut off

• Solution: Increase text box size or reduce font size

Problem: Figures are blurry

• Solution: Use higher resolution images (300 DPI)

Problem: Colors look different when projected

• Solution: Test with projector beforehand, use high contrast

Problem: File size too large

• Solution: Compress images, reduce image resolution

Problem: Animations not working

• Solution: Check PowerPoint version compatibility

Conclusion

Effective PowerPoint presentations for science require:

1. Clear, simple design
2. Readable text (24pt+ body)
3. High-quality figures
4. Consistent formatting
5. Visual validation
6. Accessibility considerations

Use the pptx skill for programmatic creation and the visual review workflow to ensure professional quality before presenting.