Devi fare scorrere la schermata per leggere il messaggio.

Devi is the second-person singular form of dovere in the present tense.

• dovere = to have to / must
• devi = you have to / you must

Italian usually drops subject pronouns when they are clear from the verb ending, so tu is not necessary.

So:

• (Tu) devi = you have to

If you added tu, it would usually sound more emphatic:

• Tu devi... = You have to...

Fare + infinitive is a very common Italian structure. It often means to make/let/cause someone or something do something.

So:

• fare scorrere = literally to make scroll / to make move along

In this sentence, it means you cause the screen content to move so that you can see more of the message.

With phones and apps, this is a natural way to describe the action of scrolling a screen or moving the display.

Yes, that is also possible and natural in many contexts.

• Devi fare scorrere la schermata...
• Devi scorrere la schermata...

Both can mean roughly You need to scroll the screen.

A small nuance:

• fare scorrere focuses a bit more on causing the screen/content to move
• scorrere is a more direct to scroll

In everyday usage, both are understandable. Interface language can vary depending on style, region, and device wording.

Not exactly.

• schermo usually means the screen as a physical display
• schermata usually means a screen/page/view shown on the device

So in app or phone language:

• schermo = the screen itself
• schermata = what is currently displayed on it

Here, la schermata is closer to the screen display / the page on the screen / the current screen view.

Italian uses articles much more often than English.

In this sentence, the article is natural because the speaker is referring to a specific screen and a specific message already understood from the context.

So:

• la schermata = the screen/page
• il messaggio = the message

Even where English might be a little more flexible, Italian often prefers the article with nouns like these.

Per + infinitive often expresses purpose in Italian.

So:

• per leggere = to read / in order to read

It explains why you have to scroll:

• Devi fare scorrere la schermata = You have to scroll the screen
• per leggere il messaggio = in order to read the message

This is a very common structure in Italian:

• Vado al negozio per comprare il pane = I’m going to the shop to buy bread
• Studio per imparare = I study to learn

It can suggest either one depending on context.

Strictly speaking:

• scorrere refers to the movement along/down/up
• in phone usage, English might describe the action as scrolling
• if you are thinking about the finger gesture, English might say swiping

So in practice, this Italian sentence can correspond to something like:

• scroll the screen
• swipe up/down on the screen

The exact English choice depends on whether you want to emphasize:

• the screen content moving → scroll
• the finger gesture → swipe

As written, it is informal singular, because devi matches tu.

So it is addressed to one person informally:

• (Tu) devi fare scorrere la schermata...

Formal singular:

• Deve fare scorrere la schermata...

Plural:

• Dovete fare scorrere la schermata...

So the only part that changes is the form of dovere:

• devi = you have to (informal singular)
• deve = you have to (formal singular)
• dovete = you have to (plural)

This is the normal and straightforward order in Italian:

• verb phrase: devi fare scorrere
• object: la schermata
• purpose phrase: per leggere il messaggio

So the sentence is structured as:

You must + make scroll + the screen + in order to read + the message

Italian often places the purpose phrase after the main action, just as English often does:

• You need to scroll the screen to read the message.

Nothing unusual is happening here; it is standard, natural word order.