Forty slides for a five-minute talk. That’s the deck I watched open on a client’s screen last month, and I nearly choked on my coffee! A Redditor posting in r/PromptEngineering, u/Cold_Hall_5384, ran into that exact wall while building decks with an AI presentation generator. They found the one-line fix that stopped it.
Why It Matters ⏱️
Every AI presentation generator has the same default setting: it pads. Ask for “a presentation on X” and you get every angle, every subpoint, every slide the model can think of to look thorough.
This isn’t a Gamma problem specifically. Most models treat “thorough” as the safe answer, because a short deck can look like it skipped something. Without a limit, the model has no reason to stop adding slides, so it just keeps going until the topic feels covered.
The original poster noticed the real problem wasn’t the tool. It was the prompt. Nothing in it told the model how much time the audience actually had, so the model optimized for “complete” instead of “useful.”
Once they added a time budget up front, everything changed. The decks came out tight, built to fit the room instead of padded to impress whoever reviews it after.
That’s the part worth sitting with. A time limit isn’t a formatting request. It’s a forcing function. It makes the model choose what actually matters instead of listing everything it knows.
There’s a real audience on the other side of that deck too. Nobody sitting through a five-minute talk wants forty slides flashed past them at double speed. A tight deck respects the time the room actually gave you. That lands better than a deck that “covers everything” but loses the room by slide twelve.
How-To Steps 🛠️
Quick start: this takes one sentence added to a prompt you’re probably already running. No new tool, no new workflow, just a missing constraint.
- Know your real time limit before you write the prompt. Five minutes on stage is a very different brief than thirty, and the model can’t guess which one you mean.
- Put the constraint at the very top of the prompt, not buried in paragraph three. The original poster used: “This is a five-minute talk, build only what fits.”
- Feed it straight into your AI presentation generator. They used Gamma, but the same line works in any tool that turns prompts into decks.
- Let the model do the cutting. A tight time budget forces ruthless prioritization, and that’s the entire point, so don’t second-guess every slide it drops on the first pass.
- Skim the output before you present it. A time limit fixes bloat, it doesn’t guarantee the right slides survived the cut. One quick pass confirms the priorities landed where you wanted.
Tips & Tricks 💡
One commenter, u/UnluckyHovercraft842, runs the same play with a slide count instead of a time limit. Swap “make me a presentation on X” for a hard slide cap, and the padding problem disappears the same way.
Test both on your next deck and see which constraint your generator actually respects. Some tools follow time budgets more literally. Others listen better to a specific number, so keep whichever one actually shrinks your slide count.
Stack the constraint with your audience level for an even tighter result. “Five-minute talk for executives who’ve never seen this data” hands the model a time budget and a depth bar in the same sentence.
Save the phrasing once you find something that works. A constraint your generator respects consistently is worth reusing as your default opener for every deck prompt from here on. That beats rebuilding it from scratch each time.
Prompt of the Day: “This is a [X]-minute talk for [audience]. Build only what fits in that time, cut anything that doesn’t earn its slide.” Swap in your real numbers and paste it at the top of your next deck prompt.
Call to Action 🚀
The fix here isn’t complicated. Tell the model how much time it has, and it stops treating “long” as “thorough.”
Most people never think to add the constraint because they’re focused on the topic, not the room the deck actually has to survive in. That one shift in thinking is the whole lesson here, and it costs nothing to try.
Drop a time budget into your next deck prompt and watch what actually gets cut. Then swing by the original thread on r/PromptEngineering to see how other prompt folks in the comments are handling their own bloat.
Frequently Asked Questions
Q: Should I set a time limit or slide count constraint?
Both work! The post’s author used time limits (e.g., “this is a 5-minute talk”), while commenters found slide count limits (e.g., “6 slides max”) equally effective. The key is being explicit upfront; some even combine both constraints for tighter results.
Q: Why do AI models generate so much bloat in presentations?
Without explicit constraints, AI models just pad content to look thorough. Set a time or length limit upfront, and the model has to prioritize ruthlessly; you get no filler, just the stuff that matters.
Q: Can I combine time limits and slide count constraints?
Yes! Try setting both (e.g., “5 minutes, 10 slides max”) for tighter guardrails. You’ll get more focused decks than with just one constraint.
the ai presentation generator prompt fix that mattered most was adding a time limit
by u/Cold_Hall_5384 in PromptEngineering