Why ‘Make Me a Poster’ Gets You Rubbish (And What to Say Instead)

If you’ve ever typed “make me a poster” into Canva’s AI design tool, or any image generator, and been disappointed with the result, this one’s for you.

The problem isn’t the tool. The problem is the brief.

Print Lord has seen countless design files that started with vague instructions and ended in heartbreak. Blurry images, wrong sizes, terrible layouts, colours that clash, text nobody can read. And almost always, it traces back to one thing: a prompt so vague it’s basically a guess.

This week, we’re fixing that. Because better prompts don’t just get you better designs, they save you time, money, and the embarrassment of print that looks amateur.

The Problem with Vague Prompts

When you ask a design tool to “make me a poster,” what are you actually asking for?

• – What size poster?
• What’s it for?
• Who’s it aimed at?
• What style?
• What colours?
• What mood?

Without those answers, the AI is guessing. And AI guesses are, let’s be honest, hit and miss. Mostly miss.

You’ll get something that’s technically a poster. It might even look fine on your laptop screen. But print it? That’s when the problems show up. Wrong proportions, generic stock images, layouts that don’t work at A3 or A2, colours that look nothing like what you imagined.

Print Lord has received files like this more times than we can count. The client thought the design looked great. The AI thought it had done its job. But nobody thought about what happens when ink meets paper.

What Specificity Actually Does

Let’s compare two prompts and see what happens.

Vague prompt:
“Make me a poster.”

Specific prompt:
“Create a bold A3 poster for a stand-up comedy night, dark background, neon accents, playful typography, high contrast, clear headline space at top.”

See the difference?

The first prompt gives the AI almost nothing to work with. The second gives it:
– Format: A3 poster
– Purpose: Stand-up comedy night
– Style: Bold, playful
– Colours: Dark background, neon accents
– Mood: High contrast, eye-catching
– Layout guidance: Clear headline space at top

That’s not micromanaging. That’s directing. And direction gets results.

The specific prompt produces something you can actually use. The right size, the right vibe, the right structure. It still needs tweaking, because AI isn’t magic, but you’re starting from a solid foundation instead of a random guess.

Why Specificity Matters for Print

Here’s the thing about print: it’s unforgiving.

On screen, you can zoom in, scroll around, adjust brightness. In print, what you see is what you get. If the layout doesn’t work, if the colours are wrong, if the text is too small, there’s no ctrl+z. There’s just a stack of posters you can’t use and a bill for a reprint.

Specific prompts help you avoid that because they force you to think about the fundamentals:

• – **Size matters.** A3 is not the same as A4. A poster is not the same as a flyer. If your prompt doesn’t specify size, the AI will pick something, and it might not be what you need.

• – **Colour affects everything.** “Dark background” vs “white background” changes the entire design. Neon accents work for a nightclub event. They don’t work for a solicitor’s brochure. Be clear.

• – **Typography needs direction.** “Playful typography” vs “professional serif font” gives completely different results. If you don’t specify, you’ll get whatever the AI defaults to, and that default might be completely wrong for your brand.

• – **Layout structure prevents chaos.** Saying “clear headline space at top” stops the AI from cramming everything into the middle or scattering text randomly. Print needs hierarchy. Prompts need to reflect that.

Print Lord checks all of this when files come in. We catch the problems, ask the questions, suggest the fixes. But wouldn’t you rather start with a good brief and save yourself the back and forth?

The Formula for Better Prompts

Here’s a simple structure you can use for almost any design project:

Format + Purpose + Audience + Style + Colours + Layout Guidance

Let’s try a few examples:

Example 1: Restaurant menu
“Create an A4 portrait menu for a modern Italian restaurant, targeting 30-50 year olds, elegant and minimal style, cream background with dark green accents, clear section headings, plenty of white space.”

Example 2: Event flyer
“Design a DL flyer for a charity fun run, targeting families with young children, bright and energetic style, yellow and blue colour scheme, bold headline at top, space for event details in the middle, clear call to action at bottom.”

Example 3: Business brochure
“Create an A5 landscape brochure cover for a professional accountancy firm, targeting business owners, clean and trustworthy style, navy blue and white, simple logo placement top left, headline space centre, no clutter.”

See how each one gives clear direction? You’re not leaving anything to chance. You’re telling the AI exactly what you need, and more importantly, you’re thinking through what will work in print before you start designing.

What Print Lord Sees in Good Briefs vs Bad Briefs

After decades in print, Print Lord can spot a well-planned project a mile off. Here’s what separates them:

Bad briefs produce:
– Random sizes that don’t match standard print formats
– Colour schemes that looked fine on screen but clash in print
– Layouts that cram too much in or waste space awkwardly
– Typography that’s unreadable at actual print size
– Generic stock images with no connection to the brand
– Files that need complete redesigns before they’re print-ready

Good briefs produce:
– Correct dimensions from the start
– Colour palettes that work in both digital and print
– Balanced layouts with proper hierarchy
– Typography that’s legible and on-brand
– Purposeful imagery that supports the message
– Files that need minor tweaks, not total overhauls

The difference isn’t talent. It’s planning. It’s thinking before designing. It’s writing a prompt that actually tells the tool what you need.

It’s Not Just Canva AI

This applies to any design tool that uses AI prompts. Midjourney, DALL-E, Firefly, whatever image generator you’re using. Vague in, vague out. Specific in, usable out.

And here’s the secret: the better your prompt, the less editing you’ll need to do afterwards. You’ll spend less time fiddling with layouts, swapping images, adjusting colours. You’ll start closer to the finish line.

That saves time. That saves money. That gets you to print faster, with better results.

What Happens Next

This week, we’re diving deep into prompt writing. Tomorrow, we’ll break down the anatomy of a good design prompt, what to include every time. Later this week, we’ll look at how to describe style, mood, and colour without needing design jargon. By the end of the week, you’ll have a toolkit of prompts you can adapt for any project.

But for today, here’s your action step:

Next time you need a design, don’t type “make me a poster.”

Write a proper brief. Include format, purpose, audience, style, colours, and layout guidance. Give the AI something to work with.

You’ll be amazed at the difference.

And if you’re still not sure? Print Lord is here. We’ve seen countless briefs, good and bad. We know what works in print and what doesn’t. We can help you get it right from the start, or fix it when it’s gone wrong.

Because print isn’t forgiving. But with the right brief, it doesn’t need to be.

Print Lord. At your service. On brand. On time.
printlord.co.uk