DeLorme 6 - Manual (Page 129)

Working With GIS
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registration is applied to a layer, it cannot have other unregistered layers
appended to it.
Append Example
Below are two examples of how an append operation would affect the primary
attribute table. Any attribute columns present in the import but absent in the target
layer will be added. Any columns absent in the import but present in the target layer
will be left in place. All unpopulated records are given NULL values. The spatial effect
of Append is the same as a copy/paste operation;abutting or overlapping geometries
are not joined.
Example 1
SOURCE LAYER
ID Name Type
1 Rt 1 Pavement
2 Deering Ave Pavement
3 Higgins Rd Dirt
TARGET LAYER
ID Name Type
4 Rt 46 Pavement
5 DeLorme Drive Pavement
6 Merrill Lane Dirt
RESULT
ID Name Type
1 Rt 1 Pavement
2 Deering Ave Pavement
3 Higgins Rd Dirt
4 Rt 46 Pavement
5 DeLorme Drive Pavement
6 Merrill Lane Dirt
Example 2
SOURCE LAYER
ID Name Type
1 Rt 1 Pavement
2 Deering Ave Pavement
3 Higgins Rd Dirt