På forsiden af dokumentet står titlen med store bogstaver.

Because forsiden is the definite singular form of forside, meaning the front page / the front side / the front.

In Danish, you usually make a noun definite by adding the article to the end of the word:

• en forside = a front page / a front side
• forsiden = the front page / the front side

So på forsiden means on the front page or on the front/front side, depending on context.

Both are possible in Danish.

• forsiden af dokumentet = the front page of the document
• dokumentets forside = the document’s front page

The version with af is often very natural and common, especially in everyday Danish. The -s genitive form (dokumentets) can sound a bit more compact or formal, depending on context.

So this sentence uses a very normal Danish structure:

• forsiden af dokumentet

Because Danish nouns belong to different grammatical genders.

• dokument is a neuter noun (et dokument), so the definite form is dokumentet = the document
• titel is a common-gender noun (en titel), so the definite form is titlen = the title

So the endings reflect the noun type:

• en-word → -en in the definite singular
• et-word → -et in the definite singular

This is because Danish follows the V2 rule: the finite verb usually comes in the second position in main clauses.

Here, the sentence begins with the adverbial phrase:

• På forsiden af dokumentet = first position

That means the verb must come next:

• står = second position

And then the subject comes after the verb:

• titlen

So:

• På forsiden af dokumentet står titlen ...

If you start with the subject instead, then you get:

• Titlen står på forsiden af dokumentet ...

Both are correct. The original sentence just emphasizes the location first.

That is a very common Danish usage. stå often means that something is written, printed, or appears somewhere.

So in sentences about text, signs, labels, instructions, and similar things, Danish often uses stå where English might use:

• is
• is written
• appears
• says

Examples:

• Der står dit navn på listen. = Your name is on the list.
• Hvad står der i brevet? = What does the letter say?

So står titlen here means something like:

• the title appears
• the title is written
• the title is printed

Literally, it means with large letters, but in normal usage it usually means in capital letters / in uppercase.

So:

• store bogstaver = capital letters
• små bogstaver = lowercase letters

In this sentence, titlen med store bogstaver means the title is written in capitals.

A more technical word for uppercase letters is versaler, but store bogstaver is the ordinary everyday expression.

Because a title normally consists of more than one letter, and the expression refers to the lettering as a whole.

• et bogstav = a letter
• bogstaver = letters

So med store bogstaver means using capital letters. Danish uses the plural naturally here, just like English does in capital letters.

Yes, absolutely.

That would be a perfectly normal sentence:

• Titlen står på forsiden af dokumentet.

The difference is mainly emphasis:

• På forsiden af dokumentet står titlen ...
  → emphasis first on where
• Titlen står på forsiden af dokumentet ...
  → emphasis first on what

So the original word order is not strange; it just foregrounds the location.

It depends on context.

Forside can refer to:

• the front page
• the front side
• sometimes the cover/front cover

With dokumentet, English might translate it in different ways depending on what kind of document it is. So på forsiden af dokumentet could be understood as:

• on the front page of the document
• on the front of the document
• on the cover of the document

The Danish itself is flexible enough to allow that range.

A useful breakdown is:

• På forsiden af dokumentet = adverbial of place
• står = verb
• titlen = subject
• med store bogstaver = adverbial phrase describing how the title is written

So the sentence pattern is roughly:

• [Place] + [Verb] + [Subject] + [Description]

That makes it a good example of normal Danish main-clause word order with a fronted adverbial and verb-second placement.