Turn on Review in Gemini Notebook to check your slide outline and video script before it renders

You ask Gemini Notebook for a slide deck from your lesson materials, wait a few minutes, and find it put the most important part at the end and dropped the section you meant to stress. To fix it, you start over. On October 19, 2026, Google published a post on the new way to create Slide Decks (slide presentations) and Video Overviews (short videos that summarize your documents) in Gemini Notebook (Google’s app for asking questions and building outputs from the documents you upload, formerly called NotebookLM). The useful part is the Review toggle: switch it on, read and edit the plan first, and the machine builds only afterward.

What Google says the new flow includes

According to Google’s post, Gemini Notebook no longer jumps from your first prompt straight to the final output. You start in the chat and ask for slides or a video. Based on your sources (the documents you loaded into the notebook), Notebook suggests the topics to include. Once you confirm, you can steer the content further and guide the visual style and format.

If you turn on the Review toggle, you can look at the plan in the studio panel (the work area beside the chat) by clicking “Review outline notes” for slides or “Review producer notes” for video. There you can add feedback, for example asking for an executive summary at the beginning or swapping the order of two scenes, before anything renders. When the plan looks right, select “Proceed” to produce the final output. Google also says these capabilities are rolling out globally to all Gemini Notebook users over the upcoming week, so your screen may not show them yet.

Follow this order

Ms. Lan, an 8th-grade teacher invented for this example, uploads three lesson files on photosynthesis and wants a review deck.

1. Upload the lesson materials to a notebook and open the chat.
2. Type a specific request, for example: “Create a photosynthesis review deck for grade 8, five sections, with check questions at the end.” According to Google, if you already say clearly what you want in the prompt, Notebook goes straight to the review step.
3. Turn on the Review toggle. If you skip it and click the output in the studio panel, Notebook still generates right away, as before.
4. Read the list of topics Notebook suggests. Confirm the parts to keep and drop the ones that do not belong in your lesson.
5. Open “Review outline notes” and read each item. Ask three things: is the most important part where you want it, is anything in there that is not in the documents you uploaded, and does the order fit how you teach.
6. Write your feedback in plain words, for example: “Move light and chlorophyll to the start, drop the history of the discovery.” For video, do the same in “Review producer notes”, for example by swapping two scenes.
7. Click “Proceed” and wait for the final output.
8. Open the result and compare it with the outline you approved. It is right if the sections appear in the order you settled on and the items you removed do not come back.

When a step does not go as expected

If the final output still has the wrong order or is missing a part you asked for, go back to the outline, write more specific feedback and generate again; do not fix page by page after the build. If you cannot see the Review toggle or the two notes entries, the feature may not have reached your account yet; Google says it reaches all users over the upcoming week, and in the meantime you can use the quick generation path. If a slide contains an idea that is not in the documents you uploaded, check it against the original before you teach it or post it, because Google’s post does not say how Notebook checks this.

Try it first on a short, low-stakes lesson before using it for a class period or a public video.

Sources

1. Google Blog, “How to shape your slides and videos with Gemini Notebook” (October 19, 2026) — describes the slide and video creation flow with an outline review step, the Review toggle and the rollout timing; this is the company’s own account and has not been independently verified.