Using created parameters as a filter

Hi guys , 

I have to create reports for diffrent lines of production .Actually i already created one report for one line . So , I created a parameter  and use it   in Queries so every time i can enter the name of line  . But I am thinking now how can I make this parameter appear in the report so the user can use it as a filter , So he can see the report for example for line 2 then to line 3 . 

I hope  i explained the problem properly 

thanks