The simplest way to incorporate multiple views of an object into a single block is to use layers. However, if you want to use the block more than once in the same file, you should use a block library.
To use layers, start a new drawing and draw the views you want to include in the block. At the least, you will want to draw each view on a separate layer. You may also use more than one layer per block—for example, for each view, you might place continuous linework on one layer and hidden linework on another.
Caption: Drawing contains two views on different layers.
Save the drawing—let’s call it Example1, then insert as a block into another drawing. Turn layers on and off to control which view is visible. Note that if you insert another instance of this block in the same drawing, both will display the same view regardless of how you try to manipulate the layers.
Caption: Then insert the drawing as a block and turn off the layers with the views you don’t want to display.
Caption: Unfortunately, you can display only one view in a single drawing. If you change the layers settings on one instance of the block, all instances will change.
That leads us to the second option, a block library. Reopen Example1 and create a separate block for each view you want to display. Include only the geometry needed for the view. Select the Retain option in the Block Definition dialog box so the geometry will remain in the drawing area. When you’re done, save and close the drawing. In AutoCAD 2005 and greater, use DesignCenter to access all the different blocks in the drawing. Just browse to the drawing (Example1 in our example) in the Folder List window. Click the plus sign to open the drawing tree, then click on Blocks. All of the blocks in the drawing will appear in the window at right so you can drag and drop as needed into your drawing.
Caption: Store all your blocks in a single drawing, then use DesignCenter (right) to drag and drop them into your drawings.
Those of you with pre-DesignCenter AutoCAD versions should insert Example1 as a block into another drawing. Press the Esc key when prompted to select an insertion point. This opens the block container—the drawing that holds the blocks. Now insert the view you want by using the name you assigned when you created the block.