I've created a custom package in LR5 but I'm unable to get it to print to my Canon Pro-100 in 13x19. It only prints as 8x10 from LR.
Thanks, Joel. I actually found a work-around for the issue just after I posted the query. I have to print the custom package to a jpeg file then reimport it to my library. After that I can send it to the printer through the Canon's Print Studio Pro, and it prints just fine.