No, "extremely bewildered" is actually an adjective phrase. Adjectives describe or modify nouns and pronouns, while adverbs modify verbs, adjectives, and other adverbs. In this case, "bewildered" is the adjective and "extremely" is modifying it.
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True, It can
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You have to make a very large image, then choose the text option
and set the size to something over 150 for extremely large text