Preflight preparation and testing involves the checking and verification of all aspects of a print job. This is to ensure that the actual progression of steps necessary to complete the job can be carried out without disruptions. Documents that are poorly prepared, with missing page elements, create the most problems in terms of accurate output.

The preflighting process may involve special software and/or checklists.

	Checking of crop marks placement and bleed allowances. 1/8" for bleeds is typical but could vary by printer.
	Cropping images, simplifying blends before placing in document
	To confirm whether file is to be submitted in reader spreads or printer spreads.
	Use only the actual fonts for bold, italic, and other font styles.
	Remove references to unused fonts and colors.
	Use a digital format preferred and accepted by your printer. Verify software version and platform, PostScript or PDF requirements.
	Send both screen and printer fonts for Type 1 fonts. Send the same format (Type 1, TrueType, OpenType) as used in the document. Send all the fonts used, including fonts in EPS graphics
	Send all graphics used, in the right format as required by the service provider and at the proper resolution for the output device. Convert graphics from RGB to CMYK
	Check proofs to ensure they accurately reflect the graphics, fonts, bleeds and include crop marks if required.
	Indicate folds, diecuts