Combining Objects into Blocks - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 350

You're prompted to specify a base point in the 07A-FPLAY4.dwg draw-
ing. Click the upper-left corner of the building using the Endpoint osnap.
Press Esc to deselect the objects.
5. In the Window panel, click the Switch Windows button and then click
Drawing#.dwg to make it active.
TIP You can also cycle through the open drawings by holding down the
Ctrl key and then pressing the tab key.
6. Right-click and choose Clipboard ➢ Paste from the context menu or
press Ctrl+V.
Pick the upper-left corner of the building using the Endpoint osnap.
The fixtures are accurately positioned in the new drawing.
If you check the layers, you'll see that the new drawing now has an
A-FLOR-FIXT layer, in addition to the A-WALL and A-DECK layers.
using AutoCAD's DesignCenter
The DesignCenter is a tool for copying named objects (blocks, layers, text styles, and
so on) to an opened drawing from an unopened one. You can't copy lines, circles,
and other unnamed objects unless they are part of a block. You'll see how this works
by bringing some layers and a block into your new drawing from 07A-FPLAY4.dwg :
1. Make 07A-FPLAY4.dwg current, and then close it. Don't save changes.
Maximize the window for your new drawing if it isn't already maximized.
2. Open the DesignCenter from the Insert tab ➢ Content panel ➢ Design
Center tool. Alternatively, you can also open the DesignCenter by press-
ing Ctrl+2, or entering DC ↵ at the command line.
The DesignCenter palette appears on the drawing area. It can be
docked, floating, or if floating, hidden (see Figure 7.52). Your screen
might not look exactly like the samples shown here. The tree diagram
of file folders on the left might or might not be visible. Also, your
DesignCenter might be wider or narrower.
3. Click the Tree View toggle button at the top of the DesignCenter (the
fourth button from the right) a few times to close and open the file
folder tree diagram.
You can resize the DesignCenter horizontally (and vertically as
well, if it's floating), and you can resize the subpanels inside. If Auto-
Hide is on, the DesignCenter hides behind the title bar until you put
your cursor on it. Leave the tree view open.