It would be very nice to simply click the header, footer, and browser arrows to be able to manually enter in the header, footer, and browner's height.
Or be able to right click the vertical ruler, vertical measuring bar on the left, and have options "Edit Header Height" and "Edit Footer Height" and "Edit Browser Height" that upon clicking will allow you to manually enter the height of the header, footer, and browser.
Or you could make a header button, footer button, and browser button that upon clicking, you could manually enter in the header and footer height.
And an option to apply the change in the header, footer, and browser height across all pages or just one page and all breakpoints or just one breakpoint would be nice too.
As a matter of fact, it would be nice to have a button that you could select an object or element and be able to choose whether to edit it across all breakpoints and/or pages or just one breakpoint or page. This would function similar to the button's that enable text to be edited acroos all breakpoints or just a particular breakpoint.
If there is a way to do this already, please let me know.