Is there a way to lock GUI buttons to a screen position insted of a pixel defined position so it will show up no matter the resolution of the screen?

http://prntscr.com/9jyl5d If you look at the picture (Follow the link above) you'll see that I have to place my menu button out side my canvas for it to be in the cornor of my phone's screen when I build it as an android app. I have a samsung galaxy S5 where the menu buttons position matches with the amount of pixels on the S5's screen but when I open the app on an S4 the menu button is placed outside the screen because of the designated position it has. Is there a way to fix this problem eg. lock the button to the cornor of the screen no matter the display resolution?