There are formal and informal modes of address, for example formal mode of address may be used in a classical music magazine or in a letter where it signs off as ,'Yours Faithfully' or 'Yours Sincerely'. Informal mode of address may use colloquial language to relate to the audience, or use expletive language whihc is more commonly known as swearing.
The mode of address in magazines can be influened by different factors of the magazine. This could include, the target audience for the magazine as if the magazine is aimed towards younger people, the magazine may be written in a colloquial tone to keep them more interested. However, if the magazine has more of an older person audience they may choose to write in more formal language as they would be able to understand and relate to it more.
The mode of address may also be affected by the genre of the magazine, for example, if the magazine was a rock or indie magazine, it wouldn't be written in formal text as it doesn't fit in with the theme of the magazine. Whereas a rock magazine may use expletive language and colloquialisms in order to fit in with the magazine.
The mode of address may also be influenced by the format of the magazine, meaning how the magazine looks to the audience. If the magazine has a formal and elegant look to it, the magazine isn't going to be written in an informal way as this wouldn't make the magazine flow very well.
