Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing / How a Blank Line Made Headlines More Persuasive
Transcript
- Lucas: So there's this A/B test I keep thinking about. Two versions of a sales letter, same headline, same offer, same body copy. The only difference was a single blank line before the headline. Response went up eighteen percent. Luna: Wait, that's it? Just a blank line? No typography change, no rewording? Lucas: Just the blank line. And it's not an isolated fluke either. I've seen similar tests in email subject lines and landing pages. Whitespace is doing real work that we rarely give it credit for. Luna: I mean, I get that whitespace makes things look cleaner, but eighteen percent is a big lift. What's the mechanism there? Lucas: I think it comes down to something called cognitive ease. When a block of text is dense and cramped, the brain flags it as harder to process. And hard to process content feels less trustworthy and less persuasive. Adding a little space signals, this is meant to be read, it's not an assault. Luna: So it's like giving the reader room to breathe before you hit them with the pitch. Lucas: Exactly. And there's a classic example from direct mail that makes this concrete. In the nineteen sixties, a copywriter named John Caples tested a simple change in a postcard mailing. He added a blank line between the salutation and the first paragraph. The response went up, and he wrote about it as one of those tiny mechanical details that moves the needle. Luna: Caples, the same guy who wrote that headline about the piano lesson? The one everyone quotes. Lucas: That's him. And he was obsessed with testing the boring stuff. Not just the words, but the layout, the spacing, the order of elements. He understood that persuasion is a physical experience as much as a mental one. Luna: So how does this apply today, when we're mostly writing for screens? Does the same blank line logic hold in an email or a landing page? Lucas: It does, but with a caveat. On desktop, a blank line before your headline is easy. On mobile, it's still fine, but you've got less vertical real estate. The principle stays: give the headline room. In one test I saw, adding a single blank line before an email subject line's preview text lifted opens by nine percent. But cramming too much space can backfire, too, so it's a balance. Luna: So it's not just about the blank line itself, it's about the contrast, the pause you're creating. Lucas: Right. The blank line creates a visual pause that says, this next thing is important. It's the same reason we put a space after a period. The brain uses that gap to segment information. Without it, everything blurs together. Luna: And that's why a wall of text feels so exhausting. It's not just that it's long, it's that there's no place to rest. Lucas: Exactly. And that's where the discipline comes in. A good copywriter is ruthless about whitespace. They'll cut adjectives to save a line, they'll move a sentence to a new paragraph if it changes the rhythm. The blank line is a tool, but it's part of a bigger system of visual hierarchy. Luna: Can you give me a concrete example of visual hierarchy working with whitespace? Like, what would a bad layout look like versus a good one? Lucas: Sure. Bad layout: everything left-aligned, no subheadings, no bullet points. The headline runs right into the first paragraph, and the first paragraph runs into the second, and you just get this slab of grey. Good layout: headline, blank line, subhead in bold, blank line, then a short first paragraph. Then maybe a bulleted list with a blank line before and after. Each element gets its own space, so the eye knows where to go. Luna: And that's what makes a letter feel like a conversation instead of a document. Lucas: Exactly. And I should say, this is something we do on this podcast too. We're always thinking about how to make the conversation feel open and unhurried, not like a wall of sound. Luna: Yeah, and that's a good reminder that these principles apply beyond copy. If you've gotten something useful from these episodes, the way we keep this show ad-free is listener support. You can buy me a coffee dot com slash fexingo, if that's helped you in your own writing. Lucas: And we genuinely appreciate that. It's what lets us keep digging into these small, surprisingly powerful details. But back to the blank line, because there's a really counterintuitive twist I want to get to. Luna: Oh, I'm all ears. What's the twist? Lucas: Too much whitespace can actually hurt you. We tested a landing page where we added generous spacing everywhere, like three blank lines between every section, and conversion dropped. It felt sparse, almost unfinished. There's a sweet spot. Luna: So it's like Goldilocks. Not too little, not too much. Lucas: Exactly. And the sweet spot depends on the medium. In a direct mail letter, you have a fixed page. You can't waste space. So the blank line before the headline is a deliberate choice. On a website, you've got infinite scroll, but attention is scarce. So you need just enough space to create rhythm, but not so much that the page feels empty. Luna: How do you find the right amount for a given piece? Is there a rule of thumb? Lucas: I'd say start with one blank line before and after each major element: headline, subhead, bullet points, the call to action. Then test. If it feels cramped, add one more. If it feels sparse, take one away. The key is to test, not guess. Luna: And when you test, what are you measuring? Clicks, conversions, or something else? Lucas: Ultimately conversions or sales. But you can also measure time on page, scroll depth, even heatmaps to see if people are actually reading. In one test, we added a blank line before the call to action button, and the click rate went up twelve percent. It was a tiny change, but it made the button feel more like a natural next step. Luna: So it's not just about readability, it's about guiding the eye to the action you want. Lucas: Right. And that's the deeper point. Whitespace is a way of directing attention. It's a silent argument about what matters. And when you use it well, you're telling the reader, this is the important part, this is where to look. Luna: I've also heard that whitespace can affect how people perceive the quality of a product or brand. Is there something to that? Lucas: There's research on that. In one study, people rated a website as more 'elegant' and 'trustworthy' when it had more whitespace, even if the content was identical. That's huge for brands that want to feel premium. But it also means if you're a discount brand, you might want less whitespace, to feel more energetic and deal-driven. Luna: So whitespace is a brand signal too. It's not just a formatting choice, it's a strategic one. Lucas: Absolutely. And that's why the blank line trick works so well. It's the smallest possible change that flips that signal from 'cluttered' to 'considered.' And the best part is, it's free. You don't need a redesign or a new tool. Just hit return twice. Luna: Has there ever been a time when adding a blank line made things worse in a test you've seen? Lucas: Only when it broke a logical grouping. Like if you have a list of three features and you put a blank line between the second and third, it reads as if the third is separate, and that can confuse people. So the blank line has to follow the semantic structure. If the content is grouped, the whitespace should group it, not split it. Luna: That's a good caution. It's not about randomly scattering blank lines, it's about using them to reinforce meaning. Lucas: Exactly. And that ties back to what we always say about copywriting: every element, even the empty ones, has a job. The blank line's job is to create a pause, and a pause is a form of emphasis. The longer the pause, the more emphasis. So you have to choose where you want that emphasis. Luna: So if you want to emphasize the headline, give it a pause before. If you want to emphasize the call to action, give it a pause before. It's like giving the reader a moment to register what's coming. Lucas: And that's also why we don't put a blank line between every sentence. That would be like shouting all the time. The contrast is what makes it work. One blank line stands out because the rest is tight. Luna: So the next time I'm writing a headline, I should look at the whitespace around it. Is it getting the room it needs to land? Lucas: That's exactly the question to ask. And if you're not sure, do what Caples did. Test it. Write two versions, one with a blank line before the headline, one without. See which one gets more response. That's the only way to know for your audience. Luna: I love that we're still learning from a technique that's basically as old as print. It's a good reminder that the fundamentals never go out of style. Lucas: The medium changes, but the brain doesn't. We'll always need pauses to think, and whitespace gives us that. So next time you're staring at a block of copy, ask yourself: where do I want the reader to pause? And then put a blank line there.