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Delete Sources Button

The Delete Sources button removes many sources from a Gemini Notebook (formerly NotebookLM) notebook at once. You tick the sources, type confirm, and click Delete Selected. Deleted sources cannot be brought back.

The Delete Sources window with a filter, Select All, Select Duplicates and a confirm box

Why delete sources here?​

Gemini Notebook (formerly NotebookLM) deletes sources one at a time. When you have to clear out thirty, that takes long. This button is like a bin you can fill all at once.

How to delete sources​

  1. Open a notebook.
  2. In the Kortex bar, in the Sources group, click the bin icon.
  3. A window called Delete Sources opens. Tick the sources to remove. Use Filter sources… to find them, Select All for everything, or Select Duplicates to pick repeats.
  4. Read the red note: the action is permanent.
  5. Type confirm in the box. This switches on the red button.
  6. Click Delete Selected. The number in brackets is how many will go.
Be careful

Deleted sources cannot be brought back. The AI also stops using them in that notebook. Download them first if you might need them. See Download sources.

Good to know​

  • This is free on every plan.
  • The window closes and the notebook refreshes when it is done.

How do I delete only sources that failed to load?​

Open All Sources in the dashboard. When some sources failed to process, a Delete bad sources button appears and asks you to confirm.

Can I hide this button?​

No. Every other Kortex bar button can be turned off in the side panel's Manage features, but Delete sources stays.

Related: The Kortex notebook bar.