The first poster is this one. This gives a clear hint as to what the story is about: a romance. However the tagline is 'This is not a love story... this is a story about love.' This hints that it is a love story with a twist. Linking with that is the picture, the main focus: Joseph Gordon-Levitt is leaning into Zooey Deschanel, showing his affection towards her. However, she isn't facing him, her leg is turned away and she is even looking in the opposite direction, despite her smile. This could suggest that she doesn't feel the same way about him, highlighting the fact that this is not a love story, as a love story generally implies that both characters love each other. The smile could be fake and implies that she is stringing him along; he feels as though she appreciates him. The colours are very minimalist and plain which contradicts what we get from the picture and tagline: white and dull blue-grey are very simple and straightforward, whereas from the picture/tagline we get that the plot is twisted and complicated. This is not your standard romantic comedy.
The second poster shows Joseph Gordon-Levitt, alone, sketching. He is the focus of the picture, suggesting that he is the main character. The giant yellow sun highlighting the title - specifically the word 'Summer' - suggests that the film is a happy, sunny one. The title is a play on words as the main character (other than Gordon-Levitt) is called Summer (Zooey Deschanel). This play on words is emphasised by the sun. There are lots of colours, in contrast to the above poster, which could suggest that the film is a happy-go-lucky and bright one. There are lots of pictures of a girl in the background, showing that there is a link between her and Joseph Gordon-Levitt's character. What we don't get from this poster is that the plot is twisted and complicated - it seems a straight-forward and happy rom-com in which Gordon-Levitt and Deschanel's characters are romantically involved.
The final poster I will be analysing is this one. This shows Joseph Gordon-Levitt looking down at his t-shirt. On his t-shirt are pictures of him and Zooey Deschanel. This immediately makes us think that it is a romantic comedy, as in one of the pictures they are kissing and on another they are watching a movie. There are several pictures of Deschanel on her own, showing that she is the object of his affections. However, there is one picture which matches the first poster I analysed: Gordon-Levitt is leaning into her and she is looking down, avoiding his gaze. In the biggest picture we see them looking at each other though neither looks particularly happy and they are standing relatively far away from each other, in contrast to the other pictures where they are in close proximity to each other.