The following form is used to resolve palette mappings:-
Resolve palette mappings
All of the columns, except for the Palette column, will be different depending on which data format is being imported. For example, importing Impact format has columns for Palette type and Regular expression, DDES3 has columns for Line type, Cut width and Layer name and AutoCad DXF (above) has Line type, Layer name and Line style.
For each entry in the table you should select the required palette from the pulldown list. The pulldown list will contain all palettes that matched the entry in the palette mapping table as described in the Impact Project section of the Import / Export Settings Palette Mapping page.