1) Media texts are composed of signs, which can have multiple meanings depending on their denotation and connotations.
2) Signs take on dominant meanings when viewed in the context of other signs through codes. Anchorage and cropping are used to guide interpretation of signs.
3) However, signs can still be open to polysemic, or multiple, interpretations depending on a person's cultural and experiential background knowledge. Understanding how signs operate individually and together through codes is important for interpreting media texts.