How to Cut Down a Presentation That Is Too Long
To cut a presentation that runs long, cut setup and background first, keep one example per point, merge slides that make the same point, and consider dropping the section you most enjoyed preparing. Re-time it out loud after each round of cuts, since paper estimates run short.
- Cut the setup, not the conclusion.
- Keep the first example; drop the second and third.
- Merge slides that make the same point.
- Consider cutting the part you most want to keep.
- Re-time it out loud after every pass.
Shortening a presentation that runs over usually means removing setup, extra examples and repeated points rather than speaking faster. Long talks tend to be long for predictable reasons: lengthy background before the main point, several examples where one would do, and slides that make the same argument twice. Re-timing the talk aloud after each round of cuts matters, because time saved on paper is often smaller than it looks.
The run-through was 45 minutes. The slot is 30. Every slide felt important when you wrote it, and talking faster just produces a worse version of the same long talk.
What should you cut from a presentation that's too long?
Long presentations often spend too much time on setup — context, history, definitions, "before we get to the main point" framing. The audience will tolerate weak setup but loses interest in weak conclusion. Cut setup ruthlessly. Get to the main point in the first three minutes. The setup material can be referenced briefly when needed, not pre-loaded as if the audience cannot follow without it.
How many examples does a presentation need?
When you have multiple examples to support a point, the first one establishes the pattern. The second and third often are not needed. The audience does not need three examples to believe you. Pick the strongest one, drop the others, save the time. Examples feel essential when you write them and turn out to be redundant when you deliver. The audience trusts you after one good example.
Can you combine slides to save time?
A long presentation often has multiple slides making similar points with slightly different framings. Combine them. Three slides about why this matters can become one slide. Two slides about the methodology can become one. The combined slide is denser but you spend less time on it, and the talk feels tighter. Look for sequential slides that share a theme — they are usually mergeable.
Should you cut the parts you like most?
Counterintuitively, the part you are most reluctant to cut is often the part to cut. It is usually the part you found most interesting while preparing — but the audience does not share your specific interest. The 'fun fact' slide. The deep tangent into history. The technical detail you found fascinating. These are personal favorites, not audience needs. Cut at least one of them every time.
How do you know if your presentation is short enough?
Cuts made on paper lie. Removing a slide does not remove all its time — you still talk through the transition, and sometimes you unconsciously re-explain the deleted material. After each cutting pass, do a full out-loud run with a timer. Aim to land about ten percent under the slot, not exactly on it: live delivery often runs longer than rehearsal, and the buffer is what keeps you from rushing the conclusion. If the run is still over, cut again from the middle — openings and closings earn their time; middles hide the padding.
Rehearse the presentation like a coach is watching.
Drop in your slides or speaking notes and The Runthrough times your delivery, flags weak spots, generates likely Q&A, and gives you a calibrated rehearsal plan for however much time you have.
Found this useful? Link to it.
https://deftbrain.com/guides/presentations/how-to-cut-down-a-presentation-thats-too-long
Free to read, no account, no paywall — link away.