ibooks Author How to set an AutoShape as a background

1. Perform one of the following actions:

2. Use a rectangular shape to mask a photo: Click the matte button in the format bar

。 If the formatting bar is not visible, choose View > Show Formatting Bar.

Mask a photo with a shape: Choose Format > Image > Mask with shape > shape.

3. Perform any of the following actions:

Resize a Photo: Drag the slider above the Edit Matte button.

Adjust the position of the photo in the frame: drag the photo.

Move Matte: Drag the dashed edge of the matte.

Adjust the size of the matte: Drag the selection handles on the dashed edge of the matte. To limit the scale of the matte, hold down the Shift key as you drag.

Rotate matte: Press and hold the Command key to drag the corner selection handle on the matte.

4. When you are satisfied with the location and size of the photo and mask, do one of the following to end the operation:

Double-click the mask or photo.

Press the Return key.

Tap outside the photo.

Click Edit Matte.

To remove a matte from a photo, choose Format > Image > Suppress matte.

Change the brightness, contrast, and other settings of a photo

The adjustments you make in IBooks Author do not affect the original photo, select the photo.

1. Click the Adjust image button in the format bar

。

If the formatting bar is not visible, choose View > Show Formatting Bar.

2, use control to make certain adjustments.

Brightness: Changes the number of white tones in the photo. Drag to the right to add white to make the photo brighter.

Contrast: Change the contrast between bright and dark tones of the photo. If contrast is enhanced, the bright part of the image is brighter and the darker part is darker. If the contrast is lowered, the contrast between the bright and dark areas decreases. Drag to the right to make the edges of the bright and dark parts clearer, and make the photo look more like an illustration.

Saturation: Changes the saturation of colors in the photo. Drag to the right to make the color more saturated or more vibrant.

Color temperature: Change the warm or cool tones of a photo by adjusting the number of warm tones (yellow) or cold tones (blue).

Color: Change the overall color deviation of a photo by adjusting the amount of magenta or green tones.

Sharpness: The focus of the photo becomes clear or blurry.

Exposure: Changes the overall brightness or darkness of the entire picture. When you adjust the exposure, each part of the photo becomes brighter or darker. Increasing exposure reduces color.

Histogram and levels: The histogram displays all the color information in the photo, from the darkest shadow (left) to the brightest highlight (right). The peak height helps to determine the color information in a given range.

To set the color scale for bright tones, drag the right level slider toward the middle. Dragging the slider to the left narrows the color range to make the highlight clearer. The slider position determines the number of colors in the brightest part of the photo, and the photo ignores information about when the slider is sliding to the right.

To set the color scale for dark tones, drag the left slider toward the middle. Dragging the slider to the right narrows the color range to make the shadows clearer. The slider position determines the number of colors in the darkest part of the photo, and the photo ignores information about when the slider slides to the left. You might want to drag the slider to the histogram to see exactly where the fluctuations are, to get more information about that location.

Enhanced: Automatically adjusts the photo by evenly distributing red, green, and blue tones in the histogram.

To restore the original settings of the photo, click Restore Image.

Remove the background or unwanted elements from a photo

Use the Instant Alpha tool to turn a portion of a photo into transparent. This feature is useful when removing unwanted backgrounds or colors.

You'll get the best results when you remove a single color with clear boundaries. To remove a less clear area, select a smaller area, and then repeat the process to select the photo.

1. Choose Format > Image > Instant Alpha.

2. Tap the color you want to turn into a transparent color, and then slowly drag to overwrite the color.

As you drag, the selection expands to include adjacent areas that use similar colors. You can drag to control the range of selected photos.

To remove all occurrences of a color from a photo, hold down the Option key and drag.

You can repeat the 3rd step at will, Important: The image cannot be larger than 25 megapixels (x 5000 pixels) or a few megabytes.

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