During the update, PADS I/O Designer looks into the PADS Designer iCDB database. PCB symbols mappings are read from the symbols.
What is Updated from PADS Designer?
Hierarchy - Only those schematics / symbols that were generated by PADS I/O Designer are updated. If you have added a symbol to the PADS Designer project and want it to appear in PADS I/O Designer, you have to import this symbol manually by using the Import Symbol command from the menu Import > Symbol.
Symbol Properties - the following symbol properties are updated from PADS Designer:
Port Label
Signal Name
Pin Number
Pin Function
PCB Signal Name
Pin Type
Port Type
Port Shape
Length
Attributes
Graphics Attributes - All graphical attributes like colors, fonts and graphical items are updated from symbol files. For details, see the section on exporting graphical attributes.