The files to submit to Gelato for print should be created in PDF format according to our design requirements.
In addition, when you submit a PDF to Gelato, the file must be the exact dimension of the final document plus bleed.
E.g. If you want to print a poster whose dimensions are 300x400mm when printed, the PDF must be 308x408mm, i.e. the original dimensions plus 4mm bleed on all sides (see example below).