to use one's head

an editor in chief

editor (newspaper editor) / editor (person who edits)

editor (program for modifying text files)

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

cyanotype / blueprint, a document used in construction and design / blueprint, a plan for the future, such as a blueprint for national recovery

photobook, photo album