I am designing large posters for print...A2 size and bigger. I create my photoshop file as 594 x 420 mm, drag a jpeg image which 7.6MB onto the canvas, enlarge it to fit canvas, then drop a logo onto it. I save as a PDF for print, which then saves to be over 200MB, which is huge.
How do I design large images for print? If I design on a smaller canvas at 300DPI, can the printers then enlarge it without effecting the quality?
Or what else can I do? Most things I am designing (a4 print ad's) end up being 50-odd MB's, is it because of the images I am using or what?