There are two ways to determine which layer an item is on:

• Look at the object’s bounding box and handles (you may need to choose View > Guides to see them). Each layer (except the Default layer) is assigned a unique color swatch in the Layers palette, and the bounding boxes and handles for objects on that layer are drawn in the layer’s color.
• Look at the Layers palette. When you select a page item, the Item icon displays in the Layers palette next to the name of the layer that contains the selected item. If you select multiple items on different layers, the Item icon displays next to each layer that contains a selected item.