Resize GUI to fit a new object

I have a GUI where I want to be able to compare two pictures on two sets of axes (the GUI starts off with only one axis.) The second axis is added on a click to select the second file, and the GUI should resize to fit the new axis in the GUI. Then, when I remove that axis, the GUI should resize to fit the original objects. I've been trying the SizeChangedFcn and looking at similar questions but they haven't seemed to help me.

[Scott Feltman]

I think I found a solution. All I did was modify the 'Position' property of the GUI and made it resize on the click. If anyone did it differently I'd be happy to read about that as well.