Dual tab view question

The doctor absolutely loves the ability to lock a tab and add another tab to view simultaneously, although she could use more space in one of the tabs. Is there a way for us to do this? If not, to improve this feature even more; add the ability to scroll a vertical dividing bar from side to side. Thereby allowing the user to adjust the proportion of screen each tab occupies. Perhaps a global or user setting? We would gladly contribute to its development.

Thank you all for your outstanding efforts and contributions.

David
@hitechelp