Slide design: What Microsoft’s Agent Mode changes for the stage

Slide design for the stage remains the speaker’s job, even though Microsoft is now handing the layout to an AI agent. As Microsoft wrote on 18 November 2025 in its post on Ignite 2025, Agent Mode in PowerPoint is now available through the Frontier programme, that is, as early access. According to Petri’s report, the agent can update templates in the company layout, create new slides and format content. Whether a slide is legible from the back row and shows exactly one message still depends, for speakers, on what they give the agent and on how they check the result in the room.

What Microsoft announced about Agent Mode in PowerPoint on 18 November 2025

In its Ignite 2025 post, Microsoft presented several agents for its Office programs. On PowerPoint it says that Agent Mode in PowerPoint is now available through the Frontier programme, and that the PowerPoint Agent creates presentations in Copilot chat. Microsoft places Agent Mode among the features with which users work on documents step by step together with Copilot.

The editors of Petri describe in more detail, in their report of 18 November 2025, what the agent in PowerPoint is meant to do: update templates in the company layout and create new slides, plus format content and bring context from work data and web sources into a presentation. According to Petri, the early access runs through the Insiders Beta Channel for Windows, a detail that is missing from Microsoft’s post. Petri likewise gives no figures on users or prices.

For speakers the news matters because the agent is meant to take over work that often falls due before a talk: bringing slides into the organiser’s layout or the company’s own layout and tidying text. Microsoft has not shown how well it does this for conferences. The stage plays no role in either report, so every statement about it in this article is our own.

Slide design for the stage starts with one message per slide

Designing slides for a conference talk means building each slide so that a person in the room understands it within a few seconds while also listening. A layout agent does not know this condition, because it sees neither the room nor the audience. It formats what it is given, and if you give it a paragraph of sixty words, you get a polished slide of sixty words.

The decision should therefore be made before the agent is used. We recommend starting each slide with one sentence that the audience could repeat afterwards, and removing everything that does not support that sentence. The slide then shows the sentence, an image or a number, and the explanation comes from the speaker’s mouth. Which formats there are at a conference is described in a separate article, and for the main stage the same rules apply in our assessment, including for a keynote. How a professional conference is organised is explained in the article on it.

A worked example shows how little text a stage slide can hold

Suppose your slot lasts 20 minutes and you plan 15 slides. That leaves 80 seconds on average for each slide, in which the audience has to read the slide and listen to you at the same time. If you set yourself a rule of thumb of at most 15 words per slide, all slides together contain at most 225 words.

A deck in handout style, by contrast, with 60 words per slide, comes to 900 words that the audience would have to read in 20 minutes while listening to you. This calculation follows from the stated assumptions and from our rule of thumb and comes from no measurement. It does show how quickly a deck that an agent has formatted cleanly can contain more text than a room can take in.

You check legibility from the back row yourself, because an agent does not see the room

The agent works on a screen, and on a screen every font looks large enough, because the viewer sits an arm’s length away and the picture is made for them. In the hall, people sit several metres from a screen that you do not know until you have seen the room. A slide must therefore work under worse conditions than on your own laptop, and checking remains manual work.

We recommend a simple test: reduce the slide in the view to a quarter of the screen, step back two paces and read the content, and whatever you can no longer make out from that distance will, in our assessment, not be read from the back rows either. The test takes only seconds per slide. If you do not know the room, ask the organisers for the aspect ratio and resolution as well as a photo of the stage.

Contrast and background belong to the same check. Whether the hall is darkened you only see on site, and in our assessment it is therefore worth having a deck that stays legible on both a light and a dark background.

An agent can maintain templates in the company layout, but it leaves the structure of a talk open

The strength Petri describes lies in maintaining templates: a deck that is to appear in the organiser’s layout or the employer’s layout can be converted quickly with it. For speakers who need the same story in changing layouts for different conferences, that saves time. The structure of the talk, meaning the order of the messages and the point at which listeners learn something they did not yet know, remains the speaker’s decision.

Anyone using the agent can therefore give it targeted instructions, for example “Set this sentence as the title, put no other words on the slide and place one number beside it.” The agent carries out the instruction, and the result can be checked with the test from the previous section.

Five steps for designing slides for the stage

1. Fix the message: Write one sentence for each slide that the audience can repeat afterwards, and delete everything that does not support it.
2. Count the words: Keep to an upper limit per slide, for example 15 words, and work it out for your slot.
3. Use the agent selectively: Give the agent the message and let it adapt layout, template and font.
4. Check from the back row: Reduce the slide to a quarter of the screen, step back two paces and read it.
5. Ask about the room: Ask the organiser about aspect ratio, stage and lighting before you finalise the slides.