I have never had problems in the past with printing documents, but ever since I started doing posters or mockups.. somehow I end up unconsciously cropping or padding (I am not sure it that is the proper term) up my set to get it to print.
Once I worked a 11 in. by 17 in. that took several prints to get it right (The print preview lied to me every time)
I think all the years of document printing has made me take for granted what the program does in the background to get my information on 8.5 in. by 11 in.
Is this practice used more in magazines (do I need to bother about it ?) ? Should I be regularly checking my printer to make sure it is aligned or set up properly ?