:help CTRL-W_K
and scroll up to the preceding paragraph which introduces that
family of commands.
You can also precede a command that performs a split with ":vert" to
make the split open vertically.
:help :vert
Regards,
Gary
If you have vertically arranged windows, one atop another:
windo wincmd H
If you have horizontally arranged windows, one beside another:
windo wincmd K
Regards,
Chip Campbell
Did you really mean to write that :vert _only_ works as a prefix to
:diffsplit? That's not true. It works as a prefix to several
commands including :new, :split, :sfind and :help, to name a few.
Regards,
Gary