The movie showed many things as they are described in the book, and also as many people imagined them. The golden toilette set, the medals and Daisy's picture where shown in his desk just like they were described in the book. Even though that half-eaten sandwich seemed out of place in his desk, since that gives the impression of a "messy"� Gatsby, and which he really wasn't.
The preparations for Gatsby's parties were almost as the book described them, with the orchestras preparing for the night, the big tents being placed on the garden, the tons of food being brought for the dinner, the grass getting cut before the event and all those preparations Gatsby had for his parties. But they skipped a detail that was discussed in class as very peculiar, the hundreds of oranges that would be brought in the morning and the tons of orange skin that were left after the party.
There were also some details that were left the same as in the book, like the sign with the big eyes and the glasses, which is later on seen as a symbolism of God, as discussed in class. The green light across the bay was shown several times to show how Gatsby constantly though of Daisy. Also the childish behavior of Gatsby, while showing his cloths to Daisy was acted very good in the movie. But not everything was perfect in the movie, there were many small details that were changed. They could be omitted either for careless of the producer or just because they were not considered important facts. Some examples are the color of Myrtle's dog, in the book it was white and brown, while in the movie it was white and black. This could be done just for practical reasons.