On October 23, 2026, Google made Gemini Notebook available as a Connected App in Gemini, with notebook queries and source-management actions from chat. Access is on by default globally except in the EEA, where it is off by default; managed accounts need both services enabled. Before asking a document question, identify the notebook and source set you intend to use. Perform the checkbox checks below in Notebook itself: do not assume its source selection automatically carries into a Gemini Connected App request.
Source labels organize a Gemini Notebook; source selection determines the material you intend to use for a question. A tidy label is not evidence that every source under it is selected or that unrelated sources have been excluded.
Define the comparison set
For a comparison between an old and a new equipment guide, identify the two exact files and their versions. Check the source selections before asking the question. Labels can make them easier to find, but should not replace that inspection.
Ask for changes supported only by the two selected guides, with references for each claimed difference. If a third, unrelated guide appears in the answer, inspect the citations and selections before accepting the comparison.
Keep selection separate from deletion
Deselecting a source is not the same as removing its original file. Preserve documents needed for other tasks. After changing the selected set, ask a small question with an answer you can locate in one guide. This verifies the scope better than the notebook’s title or a general assurance from the assistant.