want to change my gear knob on patrol don't know how to remove it

Anyone,

How do I get my gear knob off my Nissan Patrol Turbo Deisel 4x4 2000 model. I wish to replace the one I have with a custom know with a nicer one.

It appears not to just unscrew..... whoa is me..... buy and expensive car and get ripped off by parts...

Thanks,

Linda