I want to print some iron-ons (like for t-shirts) which requires printing the document in reverse (aka mirror image). Does anyone know a way to do this in Ubuntu 11.10? As far as I know, my printer does not have the function built in.
That can be easily done from lp/lpr command line: check
file:///usr/share/cups/doc-root/help/options.html#MIRROR (available online) on your system.
-o mirroroption flips each page along the vertical axis to produce a mirrored image:
lp -o mirror filename lpr -o mirror filename
This is typically used when printing on T-shirt transfer media or sometimes on transparencies.