noun, noun which may take the genitive case particle 'no'
writing with a pen; drawing with a pen
Refers to the act of writing or drawing using a pen, often contrasted with pencil or brush. Can be used as a noun or adjectivally with の.
この書類はペン書きでお願いします。
Please fill out this document in pen.
ペン書きのイラストは消せないから緊張する。
Pen-drawn illustrations can't be erased, so it makes me nervous.