begin the fun yet time-consuming process of customizing the individual pages in your book. Grab a beverage, get comfortable, and read on!

### Step 3: Customizing the Pages

Once you settle on a theme and format, you can dig into customizing each page in your book. You can reorder the pages within the book, swap photos between pages, change a page's layout, enter captions, specify a picture's zoom level, apply a filter to a picture, and so on. Much of your initial customization will likely involve dragging pages and pictures around to get the placement you want. Then you can dig into fine-tuning each picture and adding captions.

Happily, Photos lets you do most of this stuff in All Pages view (Figure 9-3), which includes thumbnails of all the pages inPhotos libraries, but also shows you which library is set as your System Photo Library (and whether it's syncing to iCloud), lets you search across multiple libraries (which Photos can't do), reveals individual pictures or videos in the Finder, and eliminates duplicate photos.

## Backing Up Your Files

Your pictures and videos are priceless—and so is all the organizational toiling and project creating you've done in Photos. Unfortunately, your digital files aren't bulletproof, and neither is your computer. Because files can get corrupted and hard drives routinely crash, you need to keep a copy of your Photos library in at least one other location. The good news is that your backup options are relatively inexpensive and painless to set up, as the box on A Super-Awesome Backup Strategy explains. And