Convention of a Film Poster :

 For a film poster there are a variety of conventions, depending on the genre that is trying to be represented. The central image is the most important element for the poster, as this is the thing which captures the audiences attentions. As all genres vary this means what is presented on the poster can vary, some poster may just choose to show a location or prop which relates back to the main image. 

 The title of the film is commonly posted towards the bottom of the poster, but some posters chose to defy the conventions by posting the title towards the top of the poster.   The title of the film is the key future which will promote the film and media, if then film was to end up doing so well it extends into franchise it will often rely on the film title and font from the original text. Examples of this are Harry Potter and Twilight. 

 A tag line or slogan is a convention commonly used for film posters, this is often  used to give the audience a slight insight as to what will happen in the film, the main purpose of a tag line is to tease the audience. The tag line can be a direct or non direct rhetorical question, usually places at opposite ends to where the title will placed, but the option the have it placed under neither the main font.  

 The film realised date is a obvious necessity to let the audience know when they will be able to view the film, the date is often red so it is clear to the reader, this is not always the case, it is up to the directors and their preference, there design and colours used.

 A common convention is to include film ratings, but this is not a necessity. The ratings will be used to enhance the positive or negative reputation of the film, if positive it will help to lead more people to view it, and it is for this reason designers would only include the best ratings, these ratings would usually be situated at either the top or bottom of the poster. 

 It is a common convention for crew and cast members names to be added to the poster. If a well known/celebrity stars in the film they will often be advertised to draw the audiences attention or if a well known director, producer or editor is to work on the film. These names will often be referenced towards the very bottom of the poster, in small bold  print. This is often small to allow the main features of the poster to take centre stage.