Microsoft Office Tutorials and References
In Depth Information
Drawing Lines and Shapes
more complex drawing, format each one individually, and even group and merge them to
create a single object that you can format, move, and resize as a single unit.
To learn how to group shapes, see “Working with Object Groups” later in this chapter. Merging shapes
is new in PowerPoint 2013; to learn about it, see “Merging Shapes” later in this chapter.
A vector graphic is one that is based on a mathematical formula, such as one you would
work with in geometry class. For example, if you draw a vector graphic line, PowerPoint
stores the line start point, line endpoint, and line properties (width, color, and so on) as
numeric values. When you move or resize the line, PowerPoint updates these numbers. Most
clip-art images are also vector graphics. In contrast, a scanned image or a photo is a bitmap
graphic, in which each individual colored pixel is represented by a separate numeric value.
This is why bitmap fi les are so much larger than vector fi les — because there are more val-
ues to track.
Here are the most important advantages of using vector graphics:
Size. Vector graphics fi les do not require much storage space because not every
pixel of the image needs to be represented numerically.
Scalability. When you resize a vector graphic, the math is recalculated and the
shape is redrawn. This means that the picture is never distorted and its lines never
become jagged the way bitmap graphics do.
The main drawback to vector graphics is their lack of realism. No matter how good an artist
you are, a vector graphic will always have a fl at, cartoonish quality to it.
3-D graphics programs such as AutoCAD are also based on vector graphics. They start out with a wireframe image of
a 3-D object (such as a cube), combine it with other wireframe images to make an object, and then use a rendering
tool to cover the wireframe with a color, pattern, or texture that makes it look more like a real object. Most computer
games also use vector graphics.
Drawing Lines and Shapes
The drawing tools in PowerPoint are the same as in other Offi ce applications. For example,
Word and Excel both have identical toolsets. The Shapes button appears on the Insert tab,
and you can click it to open a menu of the available shapes, as shown in Figure 9.1.
To draw a shape, follow these steps:
1. Select the desired shape from the Shapes palette (Figure 9.1).
2. (Optional) To constrain the dimensions of the shape — for example, to force a
rectangle to be a square — hold down the Shift key.
3. Drag to draw the shape. A silhouette of the shape appears as you drag. Release the
mouse button when you have the shape you want.
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