Vertical and horizontal spacing

[Sámuel Simon-Németh]

First of all, sorry for not understanding the docs, I hope you get it, 
being a beginner sucks.

So, the questions:
1) How would I increase the spacing between piano left hand and right 
hand, AND between systems?
2) How would I increase the minimum (horizontal) measure length, right 
now it looks a bit cramped.

Also also, sorry for sending my previous email twice, it didn't appear 
to send for the first time, and then it did.

Thanks in advance,
Sam