If you attach a drawing
that has other drawings already attached to it, those other drawings
appear in the list as nested drawings.
You can query objects
from nested drawings. If a top-level drawing is not active, you
cannot see or activate nested drawings. However, if the top-level drawing
is active, you can deactivate a nested drawing.
Working with Xrefs
To query data in an external
reference, delete the external reference from the attached drawing
and attach the reference drawing to the current drawing
The Order of Attached Drawings
The order in which you
attach drawings can affect the properties of objects retrieved by
If two drawings use the
same name for a block, layer, group, or text style, AutoCAD Map 3D uses
the definition from the first retrieved object that uses that item.
For example, if you create
a query to retrieve objects on LAYER_A, and LAYER_A does not exist
in the current drawing, AutoCAD Map 3D uses the definition of LAYER_A
in the first active attached drawing that contains objects on LAYER_A.
Objects retrieved from LAYER_A in other drawings acquire the color
and linetype that is defined for LAYER_A in this drawing. This change
also applies when you save changes back to attached drawings.
maintain consistency between drawings, define blocks, layers, groups, and
text styles in the current drawing. For example, if you define a
LAYER_A in the current drawing, AutoCAD Map 3D applies the current drawing
definition of LAYER_A to objects retrieved from LAYER_A in all attached
drawings, and when you save back, applies the current drawing layer
definition to the saved objects.
For information about
passwords and security, see AutoCAD help.