adverb taking the 'to' particle, adverb
in a big way; conspicuously; boldly
Describes something done or displayed in a large, conspicuous, or exaggerated manner. Often used with verbs like 書く, 載せる, 表示する, or 出る.
新聞に彼の写真がでかでかと載っていた。
His photo was printed prominently in the newspaper.
ポスターにでかでかとタイトルが書かれている。
The title is written in large letters on the poster.