The latest beta release of WhatsApp has added the first stage of document sharing. The WhatsApp update to v2.12.493 introduces a new documents icon to the paperclip attachments list, but for now the only type of document you can add is a PDF. To use the feature, both the sender and receiver must be on the same version of WhatsApp.
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As you may notice, by adding a new icon to the list, one had to be removed. Previously there was an option for