Printing an A3 (Word) document on an A4 printer - Super User
A4 & A3 Photo Prints - online printing from your photos or artwork
Print A3-sized schematics from A4 printer (Windows/OSX/Linux) - diyAudio
Printing a Poster by Dividing and Tiling a Single Page across Multiple Sheets | User Guide | IM C2000, IM C2500, IM C3000, IM C3500, IM C4500, IM C5500, IM C6000