In my application i am printing invoices by dot matrix printer.
Now I have to implicitly eject extra paper so that i can easily tear it from the perforated line.But for the next invoice it is esential to reverse feed the paper so that the printing starts from the top.
The problem is how to reverse feed the paper.Is there any commmand for it .or simply the printing should start from the begiinning of the paper.I am using tractor.

I don’t believe you back up on a printer.

Try advancing until the top of the next sheet is in the right place.

You should put spaces after periods (and not before them), and capitalize the 1st letter of the sentence in your posts to make reading them easier. (Also, the personal pronoun, "I," should always be capitalized, beginning of the sentence or elsewhere.)