Common Conventions of a Magazine Front Cover

Common conventions of a magazine front cover.
You can recognise the genre of the magazine at first glance as the magazine follows common conventions for the magazines genre.
Main image tells the reader about the main topic and is usually a medium shot close up.
They use teasers to pull the reader in so they want to buy/read the magazine.
A colour scheme that appeals to the reader with a magazine using 1 to 5 different colours.
Typography that appeals to the needs of the reader and the text must be readable.
The layout must be exciting and eye appealing to the target audience.
Issue number.
Date.
Barcode which can be on the front cover and some times it can be on the back.