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Lesson 10. Creating Layers > Nesting and Unnesting Layers

Nesting and Unnesting Layers

There may be times when you accidentally nest a layer. This exercise demonstrates the process of nesting and unnesting layers. Nesting is a way to group layers together. A nested layer moves with its parent layer and inherits the parent's visibility. Although the concept of nested layers sounds like a good idea, especially when creating animations (covered in Lesson 14), it is not recommended because the results may be unreliable. Be cautious: Nested layers may not display correctly in all browsers. The more layers that you have nested, the longer it will take the browser to display them and the more likely they will be to display incorrectly. If you do choose to nest layers, test your pages with all browsers to be sure the result is what you expected.

NOTE

The top (T) and left (L) values in the property inspector for a nested layer are relative to the parent layer, not the top-left corner of the page. T and L specify the location of the layer from the top-left corner of the page or parent layer. The layer position can be off the page if the values in L and T are set to negative numbers. You would do this only if you are animating the layer and want it initially off the page.



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