Centering diagrams, filename on canvas

Hello,

New to OG and having a few issues I can’t seem to resolve.

I have created a hierarchal diagram and it is not centering the full diagram on my page. I need it to center but can’t seem to make it happen.

Issue 2: my filename is showing up as black text on my canvas and I would like to remove it but can’t find out how.

Thanks,

Brian