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Mastering AutoCAD 2015 and AutoCAD LT 2015: Autodesk Official Press by Brian C. Benton, George Omura

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Chapter 5 Keeping Track of Layers and Blocks

Imagine a filing system that has only one category into which you put all your records. For only a handful of documents, such a filing system might work. However, as soon as you start to accumulate more documents you would want to start separating them into meaningful categories, perhaps alphabetically or by their use, so you could find them more easily.

The same is true for drawings. If you have a simple drawing with only a few objects, you can get by without using layers. But as soon as your drawing gets the least bit complicated, you’ll want to start sorting your objects into layers to keep track of what’s what. Layers don’t restrict you when you’re editing objects such as blocks or groups, ...

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