Apple Macintosh PhotoFlash - Manual (Page 94)

84 Chapter 5
5 Position the pointer over the part of the image you selected.
The pointer changes to the Blur icon.
6 Click anywhere in the selected area.
PhotoFlash blurs the selected area.
Sharpening an image
You can use either the Sharpen command or the Sharpen tool to sharpen an
image. The Sharpen command is usually more convenient if you’re
sharpening the whole image, and it gives you a preview of the change before
you apply it. You can also use the Sharpen command to sharpen multiple
images represented by selected catalog thumbnails. The Sharpen tool is
sometimes convenient if you’re sharpening just part of an image.
Because many printers tend to blur images slightly, sharpening an image
slightly before printing can yield better results. Note, however, that some
printers sharpen images automatically.
Sharpening an image doesn’t add any detail to it. Instead, PhotoFlash
analyzes the contents of the area to be sharpened and emphasizes the
differences between the colors of adjacent pixels. Both the Sharpen command
and the Sharpen tool allow you to adjust the degree of sharpening. You
should keep this adjustment as low as possible. Sharpening may produce
unwanted effects if you apply it at too high a setting.
Using the Sharpen command
To sharpen part of an image, an entire image, or multiple images represented
by selected catalog thumbnails, follow these steps:
1 Choose Sharpen from the Enhance menu.