How to resize partition Mac OS X?

[AlexStriz]

Hey everyone,

 

So I have been testing out the Yosemite Beta for a while and I love it, and I want to start using it exclusively (it's so close to the actual release and I haven't seen any glitches/bugs). However, when I created the partition for Yosemite, I only allocated 100gb of space for it. Is there a way I can move some of the Mavericks partition and use it for Yosemite? I can resize the partitions inside their allocated space, but I can't seem to find a way to make Mavericks smaller and use the freed up space for Yosemite. 

 

Here's a pic.The little bar about 4/5 of the way down is how big Mavericks was. I made it smaller in hopes of freeing up space for Yosemite but I can't. Any ideas?

 

I apologize that the pic is dark. It's late here and I'm using dimmer than dim.

[Wano97]

I think you can only resize it when recreating the yosemite partition

Edit:

Nvm My dad corrected me, so I'm incorrect. No idea how to do it tho