Select by Rectangle - Use to select features within a rectangle. It will prompt you for a title. There are two check boxes. The left of the two indicates if the layers is on or off. As you zoom in to an area of interest, additional layers will appear in the list and others may go away.
Some layers are too detailed to see at a statewide scale and therefore are scale dependent.
Most of the layers have documentation of their original source. As you zoom, more layers will become available to you. Blue claims are State Claims, while the red are Federal Claims. Also note, the gold lines are the RS 2477 trails. A table of attributes will be displayed below.