Width Adjusting – Add Values

When adjusting the width of a pop-up when you expand an HTML file on the board, I would like to be able to see the actual dimensions written down. If I make it a 360 width, I want to see somewhere at the top, in the expansion, the fact that it says 360 by whatever the height is. That way, I can kind of suggest things to improve on, dependent on the width of the page.