QTR-Quadtone RIP

Just began using Quadtone RIP for EP 2200 and really like the prints. However, i don't 
understand how to preveiw the results of the curves ... it seems like shooting/printing in the 
dark as i'll only know the results after i print it and, if i like the results and return to the 
curves set-up, its all back to the default setting. Yes, i know i can save the setting before 
printing but i've no way of knowing if i want to save them before i see the results and, by 
then, its too late.

Is there a way to preview your curve setting's effects on the image before printing?

Thank you,

-taiyo