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OpenOffice Impress User Guide
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E-mailing a presentation

OOo provides several ways to quickly and easily send a Writer document as an e-mail attachment in one of three formats: .ODP (OpenDocument Presentation, OOo’s default format), .PPT (Microsoft PowerPoint format), or PDF.

To send the current document in .ODP format:

  1. Choose File > Send > Document as E-mail. OpenOffice.org opens a new e-mail in your default e-mail program. The document is attached.

  2. In your e-mail program, enter the recipient, subject and any text you want to add, then send the e-mail.

File > Send > E-mail as OpenDocument Presentation has the same effect.

If you choose E-mail as Microsoft PowerPoint, OOo first creates a .PPT file and then opens your e-mail program with the .PPT file attached. The .PPT file is not saved on your computer.

Similarly, if you choose E-mail as PDF, OOo first creates a PDF using your default PDF settings (as when using the Export Directly as PDF toolbar button) and then opens your e-mail program with the .PDF file attached. The PDF file is not saved on your computer.

Tip

If you want to keep a copy of the .PPT or .PDF file as well as e-mailing it to someone, first save or export the presentation into the required format, then attach it to an e-mail in the usual way.

    1. Digital signing of documents

To sign a document digitally, you need a personal key, the certificate. A personal key is stored on your computer as a combination of a private key, which must be kept secret, and a public key, which you add to your documents when you sign them. You can get a certificate from a certification authority, which may be a private company or a governmental institution.

When you apply a digital signature to a document, a kind of checksum is computed from the document’s content plus your personal key. The checksum and your public key are stored together with the document.

When someone later opens the document on any computer with a recent version of OpenOffice.org, the program will compute the checksum again and compare it with the stored checksum. If both are the same, the program will signal that you see the original, unchanged document. In addition, the program can show you the public key information from the certificate. You can compare the public key with the public key that is published on the web site of the certificate authority.

Whenever someone changes something in the document, this change breaks the digital signature.

On Windows operating systems, the Windows features of validating a signature are used. On Solaris and Linux systems, files that are supplied by Thunderbird, Mozilla or Firefox are used. For a more detailed description of how to get and manage a certificate, and signature validation, see “Using Digital Signatures” in the OOo Help.

To sign a document:

  1. Choose File > Digital Signatures.

  2. If you have not saved the document since the last change, a message appears. Click Yes to save the file.

  3. After saving, you see the Digital Signatures dialog. Click Add to add a public key to the document.

  4. In the Select Certificate dialog, select your certificate and click OK.

  5. You see again the Digital Signatures dialog, where you can add more certificates if you want. Click OK to add the public key to the saved file.

A signed document shows an icon in the status bar. You can double-click the icon to view the certificate.

OpenOffice Impress User Guide
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  Published under the terms of the GNU General Public License Design by Interspire