This allows you to set the range of the number line. You can choose from different ranges from 0 - 10 to 0 - 10,000.
Here you can choose the display of the ticks on the number line. You can choose from 10 structure, 5 structure, or no tick marks.
The additional options allow you to show or hide certain functions of the tool: the label buttons, slider buttons, and the buttons that allow you to increase or decrease the scale.