1995 Ford Escort timeing

Engine Mechanical problem
1995 Ford Escort 4 cyl Front Wheel Drive 163366 miles

when replaceing timeing belt how do you check the timeing to make sure the timeing is right. Are there marks on the pullies or where are they. Someone else took it off and I dont trust them to say wheather they moved the pullies or not so if someone can tell me what to look for I can set the timeing. Ty