It is important to know how to manage layers !
If you have selected lots of information or data layers, your Map View could become very busy so you may need to turn some layers off to get a clearer view.
You can easily turn off ALL layers by clicking on the Turn Off All Layers button at the bottom of the data menu
If you only want to turn off some layers, simply click the box next to the layer you want to turn off. This will take the tick out of the box and it will no longer be displayed on your Map View.