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Documentation first, then email. Paid plans get a response target; everyone gets a serious answer.
Start with the guides hub: getting started, writing, decks, EPUB, PDF, billing, and AI. Most “empty page” questions are a missing click in the library or the wrong editor for the file type.
Write to support@lieditor.com from the address on the account. Include the workspace, browser, and a short reproduction. Do not send secrets or production API keys.