Fit my app for any screen

[#1]

Hi there, me again!!

I was wondering if there's a way to fit my app for any screen or resolution because im working in a 21" monitor but when i open it again in my lap top with a resolution of 1366 x 768 i have to scroll across the screen and i want it to fit automatically. So if someone have a tip about this please share it  with me

Regards!!