I'm running IC 6.1.6-64b.500.1
In all previous versions, when you plot multiple waveforms in VIVA you can select the curve on the left side and use the arrow keys to scroll through however many waveforms you have. The selected waveform will be hilighted. In 6.16 it's not working and I would like to know how to set it back. Thanks in advance.
This appears to be a bug. I filed CCR 1201410 for this - but I suggest you report it to Cadence Customer Support if you want to track it yourself.