2011

Table Of Contents
NOTE To use files with AutoCAD Release 12 or AutoCAD LT Release 2, save the
drawing using the AutoCAD R12/LT2 DXF option.
If you need to keep a drawing created in a previous release in its original
format, either mark the file as read-only, or open it in the current release and
use the File Type options in the Save As dialog box to save it in its original
format.
Because saving a drawing in an earlier release format may cause some data
loss, be sure to assign a different name to avoid overwriting the current
drawing. If you overwrite the current drawing, you can restore the overwritten
version from the backup file (filename.bak) that is created during the saving
process.
Maintain Associativity in Dimensions
Associative dimensions created in AutoCAD 2002 or later generally maintain
their associativity when saved to a previous release and then reopened in the
current release. However, if you modify dimensioned objects using a previous
release to the extent that new objects are formed, the dimension associations
change when the drawing is loaded into the current release. For example, if
a line that was dimensioned is trimmed so that an interior portion of the line
is removed, two line objects result and the associated dimension applies to
only one of the line objects.
Dimension associativity is not maintained when a drawing is saved as an
AutoCAD R12/LT 2 DXF file and then reopened in the current release.
Save Drawings with Large Objects
Drawings saved to a legacy drawing file format (AutoCAD 2007 or earlier) do
not support objects greater than 256MB. For more information about saving
drawings that contain large objects to a previous release, see
Maintain
Compatibility with Large Object Limits
on page 200.
Limitations of Saving to Earlier Versions
Saving a drawing in Release 2000/LT 2000 format is subject to the following
limitations:
File size can increase.
Encryption and digital signatures are not preserved.
Save Drawings to Previous Drawing File Formats | 1823