Hello there. I am relatively new to Maya and UV Mapping in general, so excuse me if I say something wrong.

I am currently working on a sword, and I have finally UV mapped the entire blade and hilt. I ofcourse UV map the different parts individually. That means I get a UV Texture Editor window for each part.

My question is:
Now that i have mapped all of the parts, what can i do to gather all of the UV's in one Texture?
There are so many parts, and if i select the entire blade, the Editor looks like this:

Can i make the UV square bigger to make room for them all, or does it not matter how much i downscale if all?

Thanks in advance.
Athorax