Hi Ribeiro
Composite Symbol creation explanation can be found in: C:\MentorGraphics\Capital\docs\pdfdocs\capital_symbol_user.pdf
You can place different "symbol blocks" on different schematics. The topology plane will see one these are parts of one Device.
Derivative would be a further step along the flow. Assigning different Options will lead to the appropriate information going to the correct Derivative.
For further assistancek I would suggest raising an SR on SupportNet so that more details can be discussed as appropriate.
Regards,
Pat