Specified Selections, which is visible only when the faceting property is a number, lets you create the exact selections that will be visible on your site. Each selection is made up of a range that begins and ends with the points you specify. Note that the end point for one selection is the starting point of the next, for example, points 1, 8, 23, 66 produces selections 1-8, 8-23, and 23-66.
Follow these steps:
Beside Add Range Point button, provide the number that begins the first selection. Click Add Range Point.
To add an end point, enter another number, and click Add Range Point.
Repeat steps 1 and 2 until you’ve defined the start and end points for each selection.