The alter statement changes the value of any modifiable component or netlist parameter for any analyses that follow. The parameter to be altered can be circuit temperature, a device instance parameter, a device model parameter, a netlist parameter, or a subcircuit parameter for a particular subcircuit instance.
Name alter parameter=value ...
Alter Group (altergroup)
The altergroup statement changes the values of any modifiable model, instance or netlist parameter for any analyses that follow. Within an alter group, you can specify model statements, instance statements, parameter statements and options statements (only supports temp, tnom, and scale). These statements should be bound within braces. The opening brace is required at the end of the line defining the altergroup. Altergroups cannot be specified within subcircuits. The analyses, export, paramset, save, and sens statements are not allowed within altergroups.
Name altergroup parameter=value ...