I can't seem to get it to resize elements. I'm using chrome, and I have a simple layout, just the root and two children, but no matter what I do to the settings

I can't seem to get it to resize elements. I'm using chrome, and I have a simple layout, just the root and two children, but no matter what I do to the settings of the children, they won't resize. I find the concept very useful though. It would be nice to rename elements.