If you have multiple cellviews then you would either need
to tell it which one (see the chooser sub-pulldown there)
or you would have to make the bindkey make that choise
embedded in the command. I know in my layout editor
the switch / push view defaults to layout but in schematic
there are too many possibilities of interest.
I would bet that the descend command could be given a
cellview argument.
Try descending into a couple of different viewtypes, and
have a look at your CDS.log file where all actions are
recorded; you should find syntax there, which you can
put in your custom bindkey file (like shift-E will be descend
into symbol while lower-E is descend into schematic and
ctrl-E into layout, or whatever).