Thanks for your replies. Nat, i already have that dialogue box come up each time, i would expect it to function as you suggest (i.e.pushing everything along the timeline) but it doesn't, it overwrites, hence my frustration with it. Borate, your solution partly works for me, i don't know if it's because i'm using the free version that functionality is limited, but i cannot highlight multiple frames, so will have to drag and drop each one in turn, time taking but perhaps quicker than re-doing. Thanks again to you both for taking the time to reply.