Presentation design: what makes a deck look professional

Presentation design is how you arrange text, images, and data on slides so the point lands fast and the deck reads as one object. A deck looks professional when a few decisions are made once and held everywhere: one focal point per slide, a shared grid, two fonts, a small palette, generous space, and one idea per slide.

I'm not a trained designer. I'm a founder who has built and rebuilt enough decks to notice that the professional-looking ones aren't more talented, they're more disciplined. The same short list of rules shows up in every deck that looks expensive, and the same mistakes show up in every one that looks like a projected Word document. This post is those rules, the fonts and sizes I actually use, and live example decks so you can see them working.

#What are the principles of good presentation design?

Nine principles cover almost all of it. Use the table as a diagnostic: open your last deck next to it and find the row that's quietly making it look amateur.

#How do you create visual hierarchy on a slide?

Hierarchy is the order your eye travels a slide, and you control it with size, weight, color, and position. Decide what someone should see first, make that the biggest or boldest element, and let everything else step down. When the title, a number, and a caption share one weight, the reader picks a path at random, usually the wrong one.

The cheapest fix is one idea per slide, with the point written as a full-sentence title. "Q3 revenue" is a folder name; "Q3 revenue beat plan, led by enterprise" is the point. Once it's written you usually find the slide needs half the content you thought. If a slide carries three ideas, split it into three.

This board update shows the pattern: every slide has a sentence headline and one dominant element, a number, a chart, or a short list.

#How do grid, alignment, and whitespace make a slide look calm?

Misalignment is what the eye catches even when the viewer can't name it. Two text boxes that start three pixels apart read as sloppy before anyone reads a word. So stop placing things by eye: pick one left margin for every title, pick a two- or three-column structure, and snap content to it with your tool's Align and Distribute commands instead of dragging until it looks close.

Whitespace is the other half. Empty space is the contrast that makes content readable. Widen your margins past where it feels comfortable, then leave them. If text doesn't fit at 24 point, the slide has too much on it, not too little room. Check by zooming out to 50 percent: if it still reads, it works. The same rules hold on a single page; one-pager design applies them to a one-page layout.

#What are the best fonts for presentations?

The best presentation fonts are plain sans-serifs that stay sharp when projected or compressed on a video call, with a serif as an occasional accent. These are the ones I reach for:

Pairings that rarely go wrong: Montserrat headings with Lato body; Georgia titles with Arial body; or Inter for everything, using weight for hierarchy.

Serif or sans-serif? Sans-serif for body text, because thin serif strokes get muddy on projectors and video calls. Use a serif deliberately, on a cover, a section divider, or a quote, where you want the eye to slow down.

Default or custom font? Default, unless your brand requires otherwise. Aptos, Calibri, and Arial render the same on the laptop you built the deck on and the conference room machine. A custom font falls back to something else on a computer that doesn't have it, and the layout reflows. PowerPoint on Windows can embed fonts (File, Options, Save, Embed fonts in the file), but it doesn't reliably survive Google Slides or other tools, and embedding licenses vary.

How many fonts? Two. A third needs a real job, like monospace for code. More than that looks like a ransom note.

#What font size should you use in a presentation?

Treat 24 point as the floor for body text. If a slide needs smaller type to fit, cut content instead of shrinking the font. The scale I use:

• Slide titles: 36 to 44 point, larger on a cover.
• Subheads: 28 to 32 point.
• Body text and bullets: 24 to 28 point.
• Captions and sources: 18 to 20 point, sparingly.

Guy Kawasaki's 10/20/30 rule sets a 30-point minimum, which is stricter and a good target for a pitch in a big room. The real test is the back row: if the person farthest from the screen has to lean in, the type is too small.

#How do you choose colors for a presentation?

Keep the palette small: one or two brand colors plus neutrals (a near-black for text, one or two grays, white or off-white for backgrounds). A common split is 60-30-10: about 60 percent neutral, 30 percent a secondary tone, 10 percent accent. Reserve the brightest color for the one element you want seen first on each slide, so by slide three the reader has learned "this color means important." Check contrast too: grey text on a slightly lighter grey looks fine on a laptop and disappears on a projector.

#How should you handle images, icons, and charts?

Each one earns its place by carrying an idea, or it comes off the slide. For images, go few and large: one full-bleed, high-resolution photo beats four thumbnails, and stretched stock with a drop shadow gives an amateur away instantly. For icons, pick one set at one weight and show them bare, without a tinted square behind each one.

For charts, one chart per idea, in the shape that fits the data, with the takeaway in the title. Label lines and bars directly instead of making the eye ping-pong to a legend. Sort bar charts, start value axes at zero, and cut gridlines, 3D effects, and the second decimal. Slide design ideas has a lookup table of which chart fits which idea.

This product launch deck shows large imagery, bare icons, and one chart per idea working together.

#Can PowerPoint design slides for you?

Partly. PowerPoint's Designer (Design tab, Design Suggestions) proposes layouts for the content already on a slide and can turn lists and timelines into graphics; it's a Microsoft 365 feature, also available in PowerPoint for the web. Copilot in PowerPoint can draft a whole deck from a prompt or a Word file. Both help one slide at a time, but neither enforces your brand across a deck unless you start from a well-built template. The tools that go further are compared in the best AI for PowerPoint.

#How do you keep a deck consistent without a designer?

Consistency is what makes the other principles compound: titles in the same spot, the same two fonts at the same sizes, identical margins, one chart style. When it holds, the audience stops noticing the design and hears the argument. When it breaks (a 40-point title flush left on slide 3, a 32-point centered one on slide 7, the blue shifting halfway), the deck looks assembled by four people who never spoke.

In theory the fix is a template plus discipline. In practice, deadlines, copy-paste from old decks, and a teammate's quick edit erode a template within a week. The rules aren't hard to understand; they're hard to maintain across a team and into a PDF and a PowerPoint that have to match.

That maintenance is what I built heydecks to carry. It's the AI slide creator for AI agents: an assistant like Claude or ChatGPT writes the content, and heydecks renders it into 95 fixed, hand-designed slide templates, locked to your brand by the Brand Kernel, which you extract once from your website. Fonts, colors, logo, and spacing are applied identically on every slide and every export (the live link, the PDF, and on paid plans an editable PPTX), so nobody re-decides them on slide 14 at 11pm. You still bring the message.

To see the rules in this post applied across whole decks, the templates show every layout rendered on a sample brand.

#Frequently asked questions

#What is the 10-20-30 rule of presentation design?

Guy Kawasaki's rule: no more than 10 slides, no longer than 20 minutes, no font smaller than 30 point. It's a restraint device rather than a law, and the useful core is the font size: if text has to shrink to fit, the slide is overloaded.

#What is the best font for a presentation?

A clean sans-serif like Inter, Helvetica, Arial, or Aptos, used for body text and headings or paired with a bolder weight for titles. Skip decorative and script fonts on anything people need to read from across a room.

#How do I make my slides look more professional fast?

Snap every title to the same left margin, cut to two fonts, drop to one or two colors plus neutrals, and rewrite each title as a full sentence. Those four changes fix most amateur-looking decks without design software.

#How many colors should a presentation use?

One or two brand colors plus a few neutrals, roughly in a 60-30-10 split. Adding a new accent on every slide is the fastest way to make a deck look unplanned.

#What is the Microsoft PowerPoint design assistant?

It's Designer, found on the Design tab under Design Suggestions. It suggests layouts based on the pictures, lists, charts, or dates on your slide, and requires a Microsoft 365 subscription with connected experiences turned on, though it's available to everyone in PowerPoint for the web.