On the home tab, search for an airport and tap on it. To change your home airport, go to the options tab and tap on the home airport row. From there search another home airport and tap on it to set it.
In a weather page, pull down until the spinner starts animating to refresh
Tap the star next to an airport name in the weather view
Tap on the row with the number of runways in the weather view
Visit the options tab and tap on the color theme row