Using Dynamic Blocks and Tables - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 481

A-ROOF, A-WALL-HEAD, A-GRID, A-FLOR-FIXT, and A-ANNO-TTLB-
TEXT layers. Your drawing should look like Figure 9.51.
FiGuRE 9.51 The cabin drawing with most of the layers frozen and the
doors deleted
You will use the A-DOOR block you defined in the DynDoor drawing.
Because it will take the place of both the A-DOOR-36IN and A-DOOR-
30IN blocks, it's best to remove both from the 09A-FPLAY2 drawing.
Spending a moment to perform some drawing maintenance and clean
out unneeded objects will help achieve the best drawing performance.
You will delete the block definition using the Purge dialog box.
2. On the Application menu, select Drawing Utilities ➢ Purge or enter
PURGE ↵ to open the Purge dialog box.
3. Click the plus sign (+) to expand the Blocks entry to see the two door
blocks (see Figure 9.52). Select the Blocks entry, check the Purge Nested
Items option, and make sure Confirm Each Object To Be Purged is
unchecked. Click the Purge button, and then close the dialog box.
TIP You can purge only those objects and features that do not exist
in the drawing, such as deleted blocks, empty layers, or linetypes that are
not used. Some items, including layer 0 and the Standard text style, can't
be purged. AutoCAD can also accumulate registered applications (regapps),
usually from third-party applications or features no longer used in the cur-
rent drawing, and geometry lines with a length of 0. to eliminate them, you
must enter -PURGE ↵ to start the PURGE command without the dialog box
and then enter R ↵ . the all option ( A ↵ ) will not purge these types of objects.
run PURGE often to eliminate accumulated junk in your drawing that con-
tributes to larger file sizes and slower performance.