Setting a layer’s Z-order
Since layers can overlap each other, it is sometimes necessary to specify exactly in what order several layers should overlap. You do this by specifying each layer’s Z-index. Z-indexes are positive or negative integers. A layer with a higher Z-index will display on top of a layer with a lower Z-index. If two or more layers have the same Z-index, their relative Z-positions are determined by the order of their layer marksA small icon, visible only in Edit mode, that marks the location of a layer tag in the document. in the document (that is, the order of their layer tagsThe <div> or <layer> element that represents the layer in the document source. in the document source): the layer with the last layer mark is topmost.
To set a layer’s Z-order
- Double-click the layer’s outline or layer markA small icon, visible only in Edit mode, that marks the location of a layer tag in the document. to select it.
- On the Layer Properties dialog box, go the Size section and enter a whole number in the Z-index box.