Field shingle layout marks on roof drip edge

A system, comprising:

• a plurality of drip edges, each said drip edge comprising:
• flashing configured to lay flat on a roof following installation, wherein said flashing is rectangular in shape and comprises a plurality of equally-laterally-spaced and longitudinally-oriented primary markings and a plurality of secondary markings, each secondary marking positioned adjacent to a respective said primary marking,
• wherein a first and last of the plurality of the primary markings are positioned an equal distance from opposing shorter edges of said flashing,
• wherein said primary markings are oriented parallel to the opposing shorter edges of said flashing,
• wherein said primary markings are configured to remain visible following initial installation of said drip edge on the roof, until covered by a course of shingles,
• wherein the primary markings do not penetrate fully through the flashing, and
• wherein, in an installed configuration, said drip edge is configured such that the drip edge is installed with a longer edge thereof positioned adjacent and parallel to an edge of an eave of the roof and subsequent drip edges are installed across said eave, with the first primary marking of each subsequent drip edge being aligned with a final primary marking of the previous drip edge and an additional course of drip edges is installed with a longer edge thereof positioned adjacent and parallel to an edge of a rake with subsequent drip edges are installed across said rake, with the first primary marking of each subsequent drip edge being aligned with the final primary marking of a previous drip edge, the marking of connections between primary markings creates a grid that provides shingle layout.