Why a PDF that looks fine on screen can print blurry
Screens display at a relatively low resolution compared to print, so an image that looks sharp on a monitor can still be well under the 300 DPI needed for crisp print output. A PDF exported with web-friendly, compressed settings β common in default "quick export" options β often trades resolution for smaller file size, which is exactly backwards for a print job.
Font embedding prevents a silent formatting break
A PDF with embedded fonts carries the actual font data inside the file, so it displays and prints identically on any device. Without embedding, the file only references the font by name, and a device without that font installed substitutes a similar-looking one β which can alter spacing, line breaks, and even push text onto different pages.
Frequently Asked Questions
What DPI should I use if I am not sure what the print shop needs?
DPI of 300 is a safe, widely accepted standard for most print jobs, including photos and detailed graphics. For large-format prints like posters or banners, ask the print shop directly, since requirements can differ.
Why does my printed PDF have different colors than what I see on my screen?
Screens display color using light (RGB) while most printing uses ink (CMYK), and the two systems cannot represent an identical range of colors. Exporting in the color mode your printer actually uses reduces, but does not always fully eliminate, this shift.