This filter filters particles according to their indices.
Useful when you want to see some selected particles.
Choose showing or hiding of selected particles.
"Force showing" forces the selected particles to be shown even if they are trimed by other filters above.
You can select particle index or particle ID for which the selection works.
You can select multiple numbers with comma. Also you can select range from a to b (including b) by typing a-b.
Incremetation other than 1 is acceptable. (min-inc-max)
Following is a example of sampling format.