The purposes of editing

Editing is used to put all of the film/footage into an order that makes a story and how the editor wants it to look. Obviously the right order in in chronological order, but this isnt always the case. However, the film Memento is backwards as it doesnt start from the beginning. This film was made very well as it is in the viewers eye the film is in the right order, it creates a different impact when it is shown this way. As it is shown backwards it makes the storyline very strong and very well put together. For example, here is the trailor for Memento.

Editing can also be used to have a different effect on the film that is made by the film maker. As you can use transitions from shots, the edits of the colour tones and the brightness. It makes the film more easier and clearer to understand what effect is being made. Speeding up a shot or slowing it done is done to create a more creative, special effect. For example, here is a video that shows this.