# Gemini Notebook (formerly NotebookLM) Tips and Tricks: Hidden Hacks > NotebookLM tips and tricks for 2026: hidden features and hacks most people miss, from Audio Overview formats and source picking to languages, sharing, limits. By Juli · Published Jun 18, 2026 · Updated Oct 2, 2026 · https://www.kortex-notebooklm.com/blog/notebooklm-tips-and-tricks You've probably figured out the basics of Gemini Notebook (formerly NotebookLM) by now. You upload sources, ask questions, and maybe make a podcast-style Audio Overview. However, under that simple surface sits a layer of features most people never touch: format switching, source-level grounding, multilingual audio, custom infographics, and one-link sharing. These tips and tricks turn Gemini Notebook from a fancy chatbot into a real research and study tool. People go looking for them, too. When we analyzed 1,451 Google autocomplete suggestions in October 2026, we found "notebooklm hacks", "notebooklm productivity hacks" and "notebooklm tips and tricks reddit" among them. This guide collects the lesser-known hacks for 2026, the ones that are easy to miss but quietly save you hours every week. > **Key Takeaways** > - Gemini Notebook grew traffic more than 200% in October 2024 to 31.5 million monthly visits ([Similarweb](https://www.similarweb.com/blog/insights/ai-news/chatgpt-notebooklm/), 2024), yet most users only scratch its surface. > - Audio Overviews come in four formats (Deep Dive, The Brief, The Critique, The Debate) and three lengths, all switchable from one source set. > - Selecting only some sources mid-chat grounds answers in exactly the material you want, nothing else. > - A November 2025 update gave chat a 4x larger context window and 6x longer conversation memory ([Google](https://blog.google/innovation-and-ai/models-and-research/google-labs/notebooklm-app-quizzes-flashcards/), 2025), so long sessions hold their thread. > - Gemini Notebook still can't export a notebook's sources or chats; a free extension like Kortex adds export, a saved prompt library, and web clipping. ## What are the best Gemini Notebook tips and tricks for 2026? The fastest win is treating one notebook as many different tools. Gemini Notebook now supports multiple output formats beyond audio, including Video Overviews, Mind Maps, Reports, Flashcards, Quizzes, Slide Decks, and Infographics, and you can store multiple outputs of the same type in one notebook ([Google](https://blog.google/innovation-and-ai/models-and-research/google-labs/notebooklm-video-overviews-studio-upgrades/), 2025). As a result, that single change unlocks most of the tricks below. Here's the mindset shift. Beginners ask one question, read one answer, and move on. In contrast, people who get real value treat each notebook as a workspace they can re-angle: a debate today, a quiz tomorrow, an infographic on Friday. None of that needs re-uploading. Want a foundation first? Our [30 best Gemini Notebook prompts](/blog/best-notebooklm-prompts) give you copy-paste starting points. Most of these tricks share a theme. In other words, they give you control over *how* Gemini Notebook responds, not just *what* you ask. Once that clicks, the tool feels far less like a black box. ## How do you customize Audio Overviews in Gemini Notebook? An **Audio Overview** is a podcast-style discussion of your sources. Gemini Notebook offers four formats you can switch between, plus three lengths, and this is the most underused trick in the product ([Google Gemini Notebook Help](https://support.google.com/notebooklm/answer/16212820?hl=en), 2026). Here's how they differ. | Format | What you get | Use it for | |---|---|---| | Deep Dive (default) | An in-depth conversation between two hosts. | Learning a topic properly. | | The Brief | A single speaker, under two minutes. | A refresher before a meeting. | | The Critique | Critical feedback on your material. | Reviewing your own draft. | | The Debate | Multiple perspectives argued out. | Sources that disagree. | ### Switch the format to match the job Think about what you actually need. For example, The Critique turns Gemini Notebook into a tough reviewer of your own research, which is brutal and useful. Similarly, The Debate surfaces the tension when your sources disagree. Hence one source set gives four different deliverables. Length can also be set to Shorter, Default, or Longer (English only). ### Steer the audio with a custom prompt Additionally, you can enter a custom prompt to focus an Audio Overview on specific topics or adjust the expertise level (Google Gemini Notebook Help, 2026). Tell it to "focus only on the methodology and ignore the literature review," and it will. Even better, Interactive Mode lets you join the conversation and ask the AI hosts questions by voice (English only, on newly generated overviews). In short, it's the difference between listening and taking part. > **Citation capsule:** Gemini Notebook offers four switchable Audio Overview formats, Deep Dive, The Brief, The Critique, and The Debate, plus Shorter, Default, and Longer lengths. A custom prompt can focus the topic or expertise level, and Interactive Mode lets you ask the AI hosts questions by voice (Google Gemini Notebook Help, 2026). Switching formats is the trick. That said, doing it notebook by notebook, with the same instructions typed each time, is where the clicks add up.

Every Audio Overview format, from one button

Kortex adds a Generate Audio button to every notebook in its Workspace: pick Deep Dive, Brief, Critique or Debate, set the length and add your instructions. With Pro, finished overviews land in a private podcast feed. Free on Chrome.

Add Kortex to Chrome, freeSend overviews to your podcast app

## Can you generate Gemini Notebook Audio Overviews in other languages? Yes, and it's one of the most overlooked tricks for non-English work: Audio Overviews can be generated in 80+ languages, set via the Output Language setting (Google Gemini Notebook Help, 2026). Google first announced 50+ languages in April 2025, and the Help page now lists 80+. The setting applies to both audio and chat responses, and you can change it anytime. Why does this matter beyond translation? You can upload English sources and produce a Spanish or Japanese Audio Overview for a colleague who reads neither. Alternatively, flip your own notebook into a language you're learning, so a familiar topic becomes listening practice. When we tested it, switching the Output Language mid-project and regenerating a Brief was the quickest way to hand the same research to two different audiences without redoing a single source. One small gotcha, however: Interactive Mode and the Shorter/Longer length controls are English-only for now. The 80+ language support covers generation, not yet every interactive feature. ## What file types and sources does Gemini Notebook support? The trick most people miss is how wide Gemini Notebook's source net is. It accepts Google Docs, Slides (up to 100 slides) and Sheets, Word, PDF, TXT, Markdown, CSV, PowerPoint, ePub, images, audio files, pasted text, website URLs, and public YouTube links ([Google Gemini Notebook Help](https://support.google.com/notebooklm/answer/16215270?hl=en&co=GENIE.Platform%3DDesktop), 2026). Each source can be up to 500,000 words or 200MB. ### Mix media types in one notebook The real power isn't any single format; instead, it's combining them. For example, drop a PDF report, a YouTube lecture and a few clipped articles into one notebook, and Gemini Notebook treats them as one connected set. Most users keep notebooks single-format out of habit. Mixing a podcast transcript with a research paper, though, can surface connections neither source states alone. ### Know the YouTube limitation One caption-shaped catch: YouTube imports only the caption transcript, so a video without captions adds nothing. Therefore, if a video matters, check for captions first. ## How do you ground answers in specific sources? The cleanest accuracy trick is source selection: you can temporarily select and unselect individual sources while chatting or creating Studio outputs, so a response is grounded only in the sources you care about at that moment (Google, 2026). Gemini Notebook also auto-categorizes your sources once a notebook has 5 or more. **Source selection** means ticking only the sources a reply may use. This solves a real problem. Say you have 30 sources but want an answer based only on the two most recent ones. Uncheck the other 28, ask your question, and the model can't wander into old material. In effect, it's like having ten notebooks inside one. Across the test notebooks we built for this piece, narrowing to two or three sources before a Studio output cut off-topic tangents noticeably compared with leaving all sources active. A November 2025 update also gave chat a 4x larger context window and 6x longer conversation memory (Google, 2025). Consequently, long multi-turn conversations finally hold their thread. You can interrogate a complex source across many follow-ups without the model forgetting where you started. If you manage a big library, our guide to [organizing 50+ Gemini Notebooks](/blog/organize-notebooklm-notebooks) pairs well with source selection. ## Which hidden Studio features should you know? The lesser-known Studio trick is storing multiple outputs of the same type in one notebook; thus you no longer overwrite your last result (Google, 2025). In addition, Flashcards and Quizzes let you set the topic, difficulty, and number of cards or questions. ### Customize Infographics like a designer Infographics are the hidden gem here. You can set the detail level (Concise, Standard, Detailed beta), the orientation, and, for users over 18, a visual style such as Sketch Note, Kawaii or Professional ([Google Gemini Notebook Help](https://support.google.com/notebooklm/answer/16758265), 2026). Add a custom prompt to guide color, style, or focus. Meanwhile, they generate in the background and download as a PNG, ready to drop into a slide deck or a report. ### Build a quiz bank, not a quiz Because you can now keep several outputs of one type, treat Quizzes as a growing bank, not a one-off. For instance, generate one on the methodology, another on the conclusions, a third on definitions. Why bother? Testing yourself beats rereading. Consequently, quizzes earn their keep: in a classic 2006 study, students who took recall tests remembered much more a week later than students who restudied ([Roediger and Karpicke, PubMed](https://pubmed.ncbi.nlm.nih.gov/16507066/), 2006). For an exam-prep angle, our guide on [how to study with Gemini Notebook](/blog/notebooklm-for-studying) turns these into a spaced active-recall system. The students' [research workflow](/blog/notebooklm-for-students) post covers the project side. ## How does Kortex extend these Gemini Notebook tricks? Kortex extends these tricks by adding the export, saved prompts and web clipping Gemini Notebook still lacks. Here's the honest gap the tricks expose, specifically: Gemini Notebook can send a single note to Google Docs, but it can't export a notebook's sources or chats, so most of what you generate stays inside. **Kortex** is a free Chrome extension that fills that gap with one-click export to Markdown, PDF, text and ZIP, plus a saved prompt library and web clipping that feeds sources straight in. Why does that matter? You can craft a perfect Critique-format Audio Overview or a Detailed infographic. Nevertheless, moving it into your real workflow still means screenshots and copy-paste. Kortex turns your best prompts into templates, so the questions you ask every notebook become one-click inserts. It also clips web pages into your notebooks and exports outputs, so your work lives in your docs. To be clear about what Kortex is: it enhances Gemini Notebook, it doesn't replace it. Notably, the thinking, grounding, and generation all still happen in Google's tool. Instead, Kortex handles the parts Google hasn't built yet: the export and reuse layer. If you're weighing the two, our [Kortex vs Gemini Notebook](/blog/kortex-vs-notebooklm) comparison breaks down exactly what's missing, and [getting started with Kortex](/blog/getting-started-with-kortex) walks through setup. Prefer to work from Claude or ChatGPT? Kortex MCP, a private beta for invited Kortex Pro members, lets your assistant [ask your notebooks and get cited answers](/blog/gemini-notebook-in-claude) without leaving the chat. ## Which sharing, limit and mobile app hacks are worth knowing? The sharing trick most people miss is one-link public publishing. You can publish a notebook with a single "Anyone with a link" share. Viewers can then ask questions and explore generated content like Audio Overviews, FAQs, and briefing docs without editing your sources ([Google](https://blog.google/innovation-and-ai/models-and-research/google-labs/notebooklm-public-notebooks/), 2025). Similarly, personal Gmail accounts can share a notebook with up to 50 users. ### Understand your real tier limits Knowing your real ceiling helps you plan ahead. Capacity is fixed: the free tier gives 100 notebooks and 50 sources per notebook ([Google Gemini Notebook Help](https://support.google.com/notebooklm/answer/16206866), 2026). Plus roughly doubles that to 200 notebooks and 100 sources, and Pro climbs to 500 notebooks and 300 sources. Daily counts are gone, however. Since September 2, 2026, chats and overviews draw on an allowance that scales with how much work each request takes and refreshes every five hours until a weekly cap ([Gemini Notebook Help](https://support.google.com/gemininotebook/answer/17670842?hl=en), 2026). In practice, a heavy Debate overview on a long notebook uses more than a quick chat, so plan big jobs early in a window. Our guide to [Gemini Notebook usage limits](/blog/gemini-notebook-usage-limits) shows what uses the most. ### Use mobile-only hacks The standalone Gemini Notebook mobile app, launched May 19, 2025, adds tricks the desktop doesn't have ([Google](https://blog.google/innovation-and-ai/products/notebooklm-app/), 2025): - Download Audio Overviews for offline playback. - Keep audio playing in the background while you multitask. - Tap "Join" to interrupt and question the hosts. - Share websites, PDFs or YouTube videos into a notebook from your phone's share menu. That last one, in particular, makes capturing a source on your phone effortless. Switch formats, narrow your sources, generate in the language you need and share with one link. Those are the tricks that matter, and the one thing they don't solve is getting the results out.

Keep what these tricks produce

Kortex exports your notes, chats and sources from Gemini Notebook as Markdown or PDF in one click, and saves your best prompts for the next notebook. Free on Chrome.

Add Kortex to Chrome, freeSee every export format

## Frequently asked questions ### What are some useful Gemini Notebook tips and tricks? Switch Audio Overview formats between Deep Dive, The Brief, The Critique and The Debate, and select only the sources you want before you chat. Generate overviews in 80+ languages, keep several Studio outputs of one type in a notebook, style your Infographics and share a notebook with one public link. ### What is the most useful hidden Gemini Notebook trick? Switching Audio Overview formats. Beyond the default Deep Dive, you can pick The Brief, The Critique, or The Debate, then set length to Shorter, Default, or Longer. One source set becomes four very different outputs, which saves you from re-uploading or rewriting prompts for each use case. ### Can I make Gemini Notebook answer from only some of my sources? Yes. While chatting or building Studio outputs, you can temporarily select and unselect individual sources, so a response is grounded only in the ones you pick at that moment. Gemini Notebook also auto-categorizes your sources once a notebook holds 5 or more, which keeps large libraries manageable. ### How many languages do Gemini Notebook Audio Overviews support? Audio Overviews generate in 80+ languages, controlled by the Output Language setting in your notebook. That setting applies to both the audio and chat responses, and you can change it anytime. Google first announced 50+ languages in April 2025, and the current Help page now lists 80+. ### Can I customize the look of a Gemini Notebook Infographic? Yes. Infographics offer detail levels (Concise, Standard, Detailed beta), three orientations, and visual styles like Sketch Note, Kawaii, or Professional. Add a custom prompt to steer color, style, or focus. They render in the background and download as a PNG, so you can drop them straight into a deck. ### How do I share a Gemini Notebook with other people? Use the share button to publish with an "Anyone with a link" setting. Viewers can ask questions and explore generated content like Audio Overviews and FAQs, but they can't edit your sources. Personal Gmail accounts can share a single notebook with up to 50 users. ### Does Gemini Notebook let me export my outputs? Only partly. Gemini Notebook can send a single note to Google Docs, but it can't export a notebook's sources or chats, which is a common frustration. A free Chrome extension like Kortex adds one-click export to Markdown, PDF, text and ZIP, plus a saved prompt library and web clipping on top of Gemini Notebook. --- *Editorial note: fact-checked against the official help pages and docs linked above on October 2, 2026. Spotted something out of date? [Contact us](/support) and we will fix it, or read more [about Kortex](/about).*