Cam belt and crankshaft timing marks

I have a 1998cc 16valve Renault Megane Convertible Privilidge+ which recently had a cam belt idler collapse, resulting in the usual valve damage after the belt slipped a tooth or 2. I have had the head reconditioned with new valves, guides, and followers, but before I reassemble the whole thing, I need to be sure where my timing marks on the crankshaft, and the camshafts are. Is there any possibility of a photo of what I should be looking for, and also what positions the respective shafts need to be in before reassembly. If a photo isn't possible, as accurate a description as possible would be appreciated.