can,t seem to get my head around it

[rooburger]

this is a bit stupid but can someone tell me how a banker or rover (s.a unitab) works in a trifecta or pick 4.
the girls in the tab tried to explain to me but as they say something simple will always fail somtimes. yep its my brain!
i just don,t get it the way they explained it

Rovers and bankers are different

Banker is where you stand a horse out for 1st.
Example
1st 1
2nd 3,4,5
3rd 3,4,5

If you made No 1 the Rover it can run 1st, 2nd or 3rd. With the other horses filling the other two spots.

[rooburger]

thanks Rubin, it makes a bit more sense now.