🚀 go-pugleaf

Here's a teaser which probably has a simple answer. I have used CorelDrawer for several years and loved it but now I'm coming to realise that I have to learn Illustrator or never get a job in graphics. So I bought Illustrator 10 and it seems to knock Corel into a Corelled hat. But, when I set up the page to 11*17 or something outside my printer's range of sizes (because (gasp) I'm going to go to get it printed properly) it comes back showing a dotted line round the area of the page which will fit on the printer I have at home and I can't seem to change it. On Corel this is called Printable Area and one of the nice bells and whistles is a button to turn those dotted lines off. Can this be done in Illustrator and if so, how? Please help as those lines are very distracting.Thanks Phil