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Graphics (images) in Writer

When you create a text document using OpenOffice.org (OOo) Writer, you may want

to include some illustrations. Illustrations (graphics) are added to documents for a

wide variety of reasons: from supporting the description provided in the text—as used

in this Guide—to providing an immediate visual representation of the contents, as is

often found in a newspaper.

Graphics in Writer are of three basic types:

• Image files, such as photos, drawings, and scanned images

• Diagrams created using OOo’s drawing tools

• Charts created using OOo’s Chart facility

This chapter covers images and diagrams.

More detailed descriptions on working with drawing tools can be found in the Draw

Guide and Impress Guide. Instructions on how to create charts are given in the Calc

Guide.

Creating and editing images

You might create images (also called ‘pictures’ in OpenOffice.org) using a graphics

program, scan them, or download them from the Internet (make sure you have

permission to use them), or use photos taken with a digital camera. Writer can import

various vector (line drawing) and raster (bitmap) file formats. The most common are

GIF, JPG, PNG, and BMP. See the Help for a full list.

Some things to consider when choosing or creating pictures include image quality

and whether the picture will be printed in color or black and white (grayscale).

To edit photos and other bitmap images, use a bitmap editor. To edit line drawings,

use a vector drawing program. You do not need to buy expensive programs. Open-

source (and usually no-cost) tools such as Gimp (bitmap editor) and Inkscape (vector

drawing program) are excellent. For many graphics, OOo Draw is sufficient. These

and many other programs work on Windows, Macintosh OS X, and Linux.

For best results:

• Create images that have the exact dimensions required for the document, or

use an appropriate graphics package to scale photographs and large drawings

to the required dimensions. Do not scale images with Writer, even though

Writer has tools for doing this, because the results might not be as clear as you

would like.

• Do any other required image manipulation (brightness and contrast, color

balance, cropping, conversion to grayscale, and so on) in a graphics package,

not in Writer, even though Writer has the tools to do a lot of these things too.

• If the document is meant for screen use only, there is no need to use high

resolution images of 300 or more dpi (dots per inch). Most computer monitors

work at between 72 and 96 dpi, reducing the resolution (and the file size) has

no negative impact on what is displayed but does make Writer more

responsive.

Chapter 8 Working with Graphics 237

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OpenOffice.org OpenOffice - 3.3 Manual de usuario Pagina 237