Identify Reference Tab

Provides visual aids for identifying what to edit and control how it is selected.

Reference Name

Displays the reference selected for in-place editing and any references nested within
the selected reference.

If multiple references are displayed, choose a specific xref or block to modify.
Only one can be edited in place at a time.

Preview

Displays a preview image of the currently selected reference as it was saved in the
last drawing.

The reference preview image is not updated when changes are saved.

Path

Displays the file location of the selected reference. If it is a block, no path is
displayed.

Automatically Select All Nested Objects

Controls whether nested objects are included automatically in the reference editing
session.

Prompt to Select Nested Objects

Controls whether nested objects must be selected individually in the reference editing
session.

Settings Tab

Create Unique Layer, Style, and Block Names

Controls whether layers and other named objects extracted from the reference are uniquely
altered.

If selected, named objects in xrefs are altered (names are prefixed with $#$), similar
to the way they are altered when you bind xrefs. If cleared, the names of layers and
other named objects remain the same as in the reference drawing. Named objects that
are not altered to make them unique assume the properties of those in the current
host drawing that share the same name.

Display Attribute Definitions for Editing

Controls whether all variable attribute definitions in block references are extracted
and displayed during reference editing.

If Display Attribute Definitions for Editing is selected, the attributes (except constant
attributes) are made invisible, and the attribute definitions are available for editing
along with the selected reference geometry. When changes are saved back to the block
reference, the attributes of the original reference remain unchanged. The new or altered
attribute definitions affect only subsequent insertions of the block; the attributes
in existing block instances are not affected. Xrefs and block references without definitions
are not affected by this option.

Lock Objects Not in Working Set

Locks all objects not in the working set. This prevents you from accidentally selecting
and editing objects in the host drawing while in a reference editing state.

The behavior of locked objects is similar to objects on a locked layer. If you try
to edit locked objects, they are filtered from the selection set.