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Hi Dylan. At present, there is no way to find and replace data sources across multiple cells. You might wish to add this request to our feedback repo. Separately, you could request a feature that would allow reference to a data source to be dynamically updated if the original data source name changes. Thank you for the great suggestions! https://github.com/observablehq/feedback

Thanks @aaronkyle!

For anyone reading along I'd like to add that this only applies to data sources. Code can be replaced across all cells using the Find/Replace pane in the side bar.

Superb! Thanks @Fabian Iwand