The shift G/H zoom commands not working on the mixer! This is a huge bug! I can not mix without seeing any channel names, please help fast. There is no scroll button on right so I can not scroll down to see the channel names! This is so embarrassing for Steinberg.
Geronimo, is this the same problem that I am having in this topic?:
Yes, that’s it. There is no scroll bar on right, so we can not see the ch. names. So irritating. Any help from Steinberg yet?
Are not the commands ‘g’ and ‘h’? 
Those will adjust the ‘width’ of the channels, not the height.
Not related to this issue.
Shift ‘G’ & ‘H’ can be checked (and set if necessary) in the command key assignment utility.
I had the same problem. It was only when I first opened a project after updating to 7.0.3.
I fiddled around a bit with the mixer window size, made it smaller to see if a scrollbar appears, than made it as large as possible, and so on. Played around resizing without plan, and suddenly the mixer was perfectly ok again. Don’t know what exactly did the trick. The problem never occured again, was a one-time thing.