•  In this film, 21 Jump Street, we can see the storyline immediately. 
• We can see the two main characters, and how one is really popular at their school, and the other isn't.

The conventions displayed…

• Metre Goldwyn Mayer
• Columbia Pictures
• Original Film
• The titles are in the colours of red and blue, and this suggests there is going to be something to do with the Police.
• Titles come up as if it is like a Police siren. 

Sound...

• The song 'the real slim shady' by Eminem tells us that the film is going to be a comedy
• We can see that the main character is trying to look like Eminem