could u tell me how2control printing out the certain page in smartforms?

there are many pages when I preview ,

but I only need one or several of the pages.

How to print the certain page in smartforms?

and if there are several windows in one page

how can I just print out one or several windows of them?

what should I insert "command" or "program lines" into

the "flow logic" ?

It's very kind of you to explain that in detail.

Thanks very much in advance.