A string that specifies where a GUI element should be.
"top-left"
"middle-left"
"left"
The same as "middle-left"
"bottom-left"
"top-center"
"middle-center"
"center"
The same as "middle-center"
"bottom-center"
"top-right"
"right"
The same as "middle-right"
"middle-right"
"bottom-right"