Adding a logical volume

[Colin Paul Adams]

I have uninitialized disk space on my disk (/dev/sda), and I have the
Logical Volume Management GUI tool system-config-lvm 1.1.1 running and
looking at the unpartitioned space.

How do I create a new logical volume group in that space (the obvious
way seems to be to press the Initialize entity button, but that is
greyed out)?
-- 
Colin Adams
Preston Lancashire