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90 Chapter 4 Working with Sound, Movies, Graphics, and Other Objects
After an image has been scaled down to fit on a slide, you can’t restore it to its original
size by clicking Original Size in the Metrics Inspector. To avoid downsampling and use
images at their original size, choose Keynote > Preferences, click General, and then
deselect “Reduce placed images to fit on slides.”
Masking (Cropping) Images
You can crop images without actually changing the image files by masking parts of
them.
Cropping an Image Using the Default (Rectangular) Mask
You can use a rectangular mask to define the boundaries of an image.
To crop an image using the default (rectangular) mask:
1 Import the image you want to mask (see “Importing an Image” on page 89 for
instructions).
2 Select the image, and then click the Mask button in the toolbar.
A mask appears over the image, and some controls appear.
3 To resize the image, drag the slider above the Edit Mask button.
4 Refine the mask by doing any of the following:
 To resize the mask, drag the selection handles. To constrain the mask’s proportions,
hold down the Shift key as you drag.
 To rotate the mask, hold down the Command key as you drag a corner selection
handle.
5 Drag the image to position the part you want to show. To move the mask, click the
dotted edge of the mask and drag it.
Drag the selection handles
to resize the mask.
Drag the image to
position the part you
want to show.
Drag the slider to resize
the image.
Click to show or hide the
area outside the mask.