Found this in FAQ Can I change the way the board looks? You may be able to change the styling of the board by using the style changer in the bottom left of the page. This lets you choose different skins which change the color scheme and appearance of the board. If this option does not appear, the board cannot be restyled. If the style changer was provided, could it be possible to, for instance, increase the number of threads viewable in threaded mode before having to scroll to see more?
Be nice to be able to change the style to a "stealth mode" with minimal graphics, colours and such for those cheeky sessions at work. Maybe a view that looks exactly like a spreadsheet although that's probably asking a bit too much!