Calculate exact trim, bleed (+0.125" / 3mm), and safe margin pixel dimensions for business cards, flyers, and posters—then launch a canvas with live print guides enabled.
Standard 0.125 inch (1/8") bleed on each side adds 0.25 inches total to width and height, which equals +75 pixels per dimension at 300 DPI (e.g., a 3.5"×2" business card becomes 1125 × 675 px with bleed).