When “Good Enough” Typography Isn’t
You’ve picked a nice font. You’ve paired it with something complementary. You’ve set reasonable sizes for titles and body text. By most standards, your typography is fine.
And that’s exactly the problem. “Fine” is what everyone else does. “Fine” is what the audience has seen in a thousand other presentations this year. If you want your slides to feel like they came from a professional design studio — not a template — you need to go beyond font selection. You need to control the invisible details.
I learned this the hard way. Years ago I delivered a presentation I was proud of. Great content, clean slides, good font choices. Afterward, a designer friend pulled me aside and said, “Your deck is solid, but the type feels… tight. Like it can’t breathe.” She was right. I had paid zero attention to spacing — line height, letter spacing, paragraph gaps. Those invisible numbers were silently dragging down everything else.
Here’s what most people never learn about slide typography, and how to fix it.
Kerning: The 1% That Changes Everything
Kerning is the space between individual letter pairs. PowerPoint and Keynote both auto-kern by default, and for body text, that’s usually fine. But for large display text — titles, hero numbers, big quotes — auto-kerning frequently fails.
Look at a word like “AVOID” in a 72pt title. The A and V often have a gaping hole between them, while the V and O practically overlap. That’s bad kerning. The fix is manual: select the text, open the Font dialog (Ctrl+D in PowerPoint, Cmd+T in Keynote), and find the character spacing controls. In PowerPoint, set spacing to “Expanded” or “Condensed” by 1-2 points for specific letter pairs. In Keynote, use the Character Spacing slider.
The rule: for any text above 48pt, manually check problematic pairs. Common offenders: AV, AW, AY, FA, LT, PA, TA, VA, WA, We, Wo, YA, YO. Letters with slanted strokes (A, V, W, Y) next to straight letters (L, T, P) almost always need adjustment. This takes 30 seconds per slide and the difference is immediately visible to anyone with design awareness.
When you don’t do this, titles look sloppy in a way the audience can’t articulate but absolutely feels. When you do it, the type looks “tight” and professional — like a magazine headline, not a PowerPoint default.
Leading: Give Your Text Room to Breathe
Leading (line-height in CSS terms, line spacing in Office-speak) is the vertical space between lines of text. The PowerPoint default is 1.0 — single spacing. That’s fine for a Word document. It’s terrible for slides.
When lines are too close together, the eye struggles to track from the end of one line to the beginning of the next. This slows reading speed and increases cognitive load. Your audience isn’t reading your bullet points — they’re fighting them.
My default rule: body text on slides should be at least 1.3x line spacing, and 1.5x is often better. For presentations shown on large screens or in large rooms, go even wider — 1.6x to 1.8x. The larger the viewing distance, the more spacing you need between lines to maintain readability.
The math behind this: research on reading comprehension shows that line spacing of 1.4x to 1.6x produces the fastest reading speeds for sans-serif fonts on screens. Below 1.2x, comprehension drops measurably. Above 2.0x, the lines feel disconnected and the eye loses its place.
In PowerPoint: select text → Paragraph settings → Line Spacing → Multiple → enter 1.3 or 1.5. In Keynote: Format → Text → Spacing → Line → adjust the slider or enter a value.
Exception: titles and short headings can use tighter spacing (1.0-1.2x) because the eye processes them in a single glance — there’s no line-to-line tracking required.
Tracking: The Global Letter Spacing Control
While kerning adjusts individual pairs, tracking adjusts letter spacing across an entire selection. PowerPoint calls this “Character Spacing” (Expanded/Condensed). Keynote calls it “Character Spacing” with a slider.
When to expand tracking (+spacing):
- All-caps headings and labels. ALL CAPS TEXT FEELS CRAMPED at default spacing. Expanding by 5-10% makes it breathe.
- Small text (below 14pt). Tiny letters need more space between them to stay legible.
- Light-on-dark text. White text on dark backgrounds appears to contract optically — adding 2-5% spacing compensates.
When to condense tracking (-spacing):
- Very large display text (above 80pt). At huge sizes, letter gaps become exaggerated.
- Tight-fit layouts where every pixel counts (use sparingly — never below -5%).
The trap beginners fall into: they discover tracking and start applying it everywhere. Don’t. Most body text should stay at default tracking. Only adjust when there’s a specific legibility problem to solve.
Paragraph Spacing: The Forgotten Hierarchy Tool
Here’s a mistake I see constantly: slides where bullet points are separated by line breaks (Enter) instead of proper paragraph spacing. The result is inconsistent gaps that shift whenever anyone edits the text.
The right way: set “Space After” on your paragraph style. 6-12pt after body paragraphs, 18-24pt after section breaks. This creates consistent, predictable rhythm. Your slide text will look composed rather than cobbled together.
In PowerPoint, this lives in Paragraph settings → Spacing → After. In Keynote, Format → Text → Spacing → After Paragraph.
The bigger principle: use spacing, not empty lines, to create separation. Empty lines are fragile (they get deleted accidentally) and inconsistent (different fonts produce different line heights). Proper paragraph spacing survives edits and stays uniform across the deck.
Widows and Orphans: The Mark of an Amateur
A “widow” is a single word on the last line of a paragraph. An “orphan” is a single line of a paragraph stranded at the top or bottom of a text box. Both look terrible on slides.
Widows are easier to fix: adjust the text box width very slightly, or tweak the wording to shorten or lengthen the last line by a word or two. Never leave a single word dangling — it creates a visual hole that draws the eye away from your next point.
Orphans are trickier because they often require rethinking the amount of text per slide. If a bullet point is spanning across a text box boundary awkwardly, either cut the content to fit or split it into two slides. The slide format is inherently chunked — work with the chunking, not against it.
Alignment: Pick One and Commit
Center-aligned body text is almost always wrong on slides. Here’s why: center alignment creates a ragged left edge, which means the eye has to hunt for the start of each new line. Left-aligned text gives the eye a consistent starting position, line after line, reducing cognitive load.
The only acceptable uses of center alignment on slides:
- Short titles (under 8 words)
- Single-line quotes
- Call-to-action buttons or phrases
- Closing “thank you” slides
Everything else — body text, bullet points, captions, labels — should be left-aligned. Right alignment is even rarer; use it only for design accents like page numbers, dates, or asymmetrical layout effects.
Justified text on slides? Almost never. Justification creates uneven word spacing (rivers of white space running through paragraphs) that makes reading harder. The only exception: a slide that’s deliberately designed to look like a magazine spread, where you’re manually adjusting hyphenation and word spacing. For 99% of presentations, stick to left-aligned.
Consistent Baseline Grid: The Pro Secret
Ever notice how some slide decks feel “calm” while others feel “jumpy”? A hidden cause: inconsistent text baselines. When text boxes on different slides start at slightly different vertical positions, the content appears to bounce as you advance through the deck.
The fix: pick a vertical starting position and stick with it across all slides. Most pros use the top third of the slide. In PowerPoint, use guides (View → Guides) to mark the title position and body text start point. In Keynote, set up your master slides with consistent text box positions.
This is tedious to retrofit but trivial to implement from the start. And once you notice it in your own decks, you’ll never unsee it in other people’s.
The Quick Typography Audit
Before you present, run through this checklist on every slide:
- Kerning check: Any titles above 48pt with bad letter pairs? Manual-adjust the AV/AW/YA offenders.
- Leading check: Body text at 1.3x or above? Increase if lines feel cramped.
- Widow check: Any single words dangling on their own line? Eliminate them.
- Alignment check: Body text consistently left-aligned? No center-aligned paragraphs?
- Baseline check: Text starting positions consistent across all slides?
Five checks, maybe 10 minutes total for a 30-slide deck. The result: typography that feels polished, professional, and invisible in exactly the right way — your audience focuses on what you’re saying, not on why the letters look weird.
Typography done right doesn’t draw attention to itself. It just makes everything feel better.