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我正在尝试使用此代码：
test_tabulizer <- tabulizer::extract_areas("Avai 2020.pdf", pages = 5)
要从 PDF 中提取表格，但 PDF 在 R 查看器中显得很小，如何在查看器上应用缩放以更轻松地从 PDF 页面中选择表格？