Is there a way to change the value of a voltage source (or a generic parameter), "during" the execution of an Interactive mode AMS simulation?

Hello all,
 I was wondering if there is a way to change the value of a voltage source interactively, during the execution of an AMS simulation. 
In SimVision, I can not  deposit a value on a VerilogA model parameter, like DC value or delay. 

An example would be how to create the following waverform with user commands:

. 

Any help or idea  will be very much appreciated.

Many thanks in advance and best regards,
Ardit