Join Joseph "PhotoJoseph" Linaschke for an in-depth discussion in this video Using image masks, part of Learning iBooks Author.
Once you've added an image into your iBooks Author document, you may find that you want to Crop it. Cropping in iBooks Author is done by something called Masking. You can size the image however you like, and then while it's selected, go to the Format menu and choose Image > Mask. By default it creates a simple box around the image that you can then re-size and scale on position however you like. Click and drag in the image to move it around. You can also zoom into the image with this slider here.
Once you have it masked out the way you like, tap outside the image and all you'll see is the final result. If you'd like to edit the mask, just click on the Edit Mask button and you can get back to editing that and repositioning the image inside of it. To remove a mask, simply select the image, and from the Format menu, choose Unmask. You can also choose to mask with any custom shape. For example, you have shapes such as rectangles, ovals, triangles and so on that you can apply. I'm going to choose to mask this image with an oval. Once that's been added, I can resize that oval however I like. Let's go ahead and position it over the girl, like so. And then once again tap outside of the mask to finalize it. Now I have an oval mask that I've applied to my image. You can even create completely customized mask shapes. Let's go back to the Format menu and reset this. And then from the shapes menu, I'll choose the Freehand Drawing tool. Now, I'm going to draw a loose box around the model here that I want to use as my basic mask shape.
This shape can be completely customized later. So don't worry if you don't get it right the first time. Once the shape has been selected, you'll need to keep that selection. So Shift click on the image behind it so that both the image and the shape are selected. And then from the Format menu, choose Image > Mask With Selected Shape. When you do that, the shape that you've just drawn becomes the mask for that photo. Just as before, to edit the mask, simply select the image, tap on Edit Mask and now you have access to all the different control points for the shape that you just drew.
- Your first ebook in just four minutes
- Creating covers and introductions
- Importing and formatting text
- Adding and adjusting images
- Creating custom layouts
- Inserting tables, charts, and galleries
- Adding audio and video
- Creating a table of contents or glossary
- Previewing and publishing your iBook