Hello! I love NGUI, it is simple to use, what can I say

Now, one problem occured, I hit the wall.
It's all fine and dandy, but I just want to make specific play buttons to be bigger when screen is small.. Also I use anchors, if this is important

UI is based on Nexus 7's resolution: 1280x800
But when I run the same game in 480x320 device, it's ok just play control buttons are really small, so small that I can't even hit them without special surgeon procedure..
One solution is to scale that anchor where buttons are!
But I want to ask here, is this even viable option?