Hello,
there are two possibilities,
1) modify configuration files:
You can modify the structure of the bill of material window in the CATAsmBom.CATNls file and the size of the columns in the CATAsmBom.CATRsc file.
On NT, both files are under your CATIA installation directory :
...\intel_a\resources\msgcatalog\CATAsmBom.CATNls
2) use macro
-create BOM-format You want
-start recording macro
-go back to BOM and save it
-stop recording
-edit macro, remove save command
-run macro when You want to restore settings
(macro don't save colunm width)
regards TPale