Flex the stack on all four sides to remove any stiffness. Check all corners. If the corners
are curled, straighten them.
Correct any dog-eared corners, then align the edges of the stack of envelopes by
tapping them on a flat surface.
Printing Envelopes with the Multi-Purpose Tray
Be sure to flatten out the leading edges of the envelopes if they are curled
downwards. Otherwise a paper jam may occur.