When you want to merge
two or more features, for example separate line segments that represent
the same road, use the MAPFEATUREMERGE command.
The resulting feature property values are determined by the rules specified
in the Split and Merge Rules dialog box.
To ignore rules specified in this dialog box, turn on (see To turn Ignore Split And Merge Rules on or off).
You can merge two or
more features of the same class into one feature. You can also merge
features with drawing objects. You can specify a new or existing
feature ID for the resulting feature.