I have a veritas file system (fsA) that is nearing capacity. We have secondary file system (fsB). that is unused and would like to move some of it's disk space but I'm unsure as to how to do this with.

/dev/vx/dsk/vg05/lvol05
25288704 21887258 3188911 88% /fsA
/dev/vx/dsk/vg05/lvol04
256000000 152953 239856631 1% /fsB

I know how to grow the file system using the command:
vxresize -F vxfs -g vg05 lvol05 +2G

But how would I allocate 40GB from lvol04 to lvol05?
I'm a veritas/filesystem newb.