Pages
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Layer, group, and lock objects in Pages on Mac
You can work with and arrange the objects on a page in a number of ways:
Layer (or stack) objects to create the appearance of depth
Group objects to more easily move, resize, or rotate them as a single unit
Lock objects to avoid inadvertently moving, modifying, or deleting them
If you can’t select an object, it may be a section layout object placed on the page background. To edit it, you first need to make it selectable (choose Arrange > Section Layouts > Make Layout Objects Selectable).