The layout of the Marquee screen is flexible and allows you to look at the information you need when you need it. When Marquee starts, the screen is not a busy as this:

To add or remove screen components, use the Display Menu or press [S5] to show the display popup list:

As well, you can resize the Fixture Grid by clicking or right clicking on the splitters.
For more information on what areas of the screen do what, hover and/or click on the image above.