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我正在使用 YaHPConverter 工具将 HTML 文件转换为 pdf 文件,并且我想限制用户进行复制、编辑、另存为、导出。只有用户应该打印。
查看 pdf 时,它会显示一个带有上述选项的小条。如何禁用此条上的某些可用选项?