Complex sentence: Today, many of these small letterpress shops survive by printing fine editions of books or by printing upscale invitations and stationery, often using presses that require the press operator to feed paper one sheet at a time by hand.
Split into simpler sentences: Today, many of these small letterpress shops survive by printing fine editions of books or by printing upscale invitations and stationery. These methods often use presses that require the press operator to feed paper one sheet at a time by hand.