Freeze Panes - Segments & Calc Metrics

Often times when I am building segments and calculated metrics, it would be helpful to be able to freeze the top portion of the builder window so I don't' have to keep scrolling up and down. For example, when building a segment, as you change the segment definition, it is nice to be able to see the impact at the top-right on the segment potential audience. Unfortunately, today, you have to make a change and then scroll.  The same is true for large calculated metrics where you cannot see the top portion.

It would be cool if you could check a box to freeze the top part or just have that be default behavior...