>Hi
>
>My report page size is A4 size but when I send it to printer the document does not fit A4 form,
>it needs other page to print the document
>If I want to use one page, I have to open printer setup and change to a page size bigger than A4
>
>1- Why it does not fit A4 page ?

You're the only one who can answer the question

>2- How can lock the printer paper size to my report, so I don't have to change it every time ?

See Re: How set custom paper for reports Message #1318651