Add Dial Level increase/Decrease Button on RealTime Reports

Add Dial Level increase/Decrease Button on RealTime Reports
I am using Goautodial 3.3
can some one tell me how to add buttton to increase / decrease dial level in real time reports in VICIDIAL.
I am using Goautodial 3.3
can some one tell me how to add buttton to increase / decrease dial level in real time reports in VICIDIAL.