NAV 2013 offers some fabulous ways to spice up your pages.
Using Style as a Visual Signal
Visual signals are a quick way to get a message across to the user. Pages offer us a wonderful way to do this with colors and bold text. You may have noticed on the Customer Ledger Entry page that when an entry is past due, some of its fields appear in bold red. This is done using STYLE and STYLEEXPR properties on fields. Here’s how you accomplish this dynamically, based on your coded conditions: