Hvis jeg laver en fejl, kan jeg slette den med en enkel genvej på tastaturet.

Hvis means if and introduces a condition. It starts a subordinate clause: Hvis jeg laver en fejl = If I make a mistake.

In Danish, clauses introduced by words like hvis, fordi, at, and når are subordinate clauses.

Because Danish subordinate clauses normally keep the basic order subject + verb.

So you get:

• Hvis jeg laver en fejl
  not
• Hvis laver jeg en fejl

The verb-second rule applies to main clauses, not in the same way inside subordinate clauses.

This is because Danish main clauses follow the verb-second rule.

The first position is already taken by the whole subordinate clause:

• Hvis jeg laver en fejl, ...

So in the main clause, the finite verb must come next:

• kan jeg slette den ...

That is why it is:

• Hvis jeg laver en fejl, kan jeg slette den ...

and not:

• Hvis jeg laver en fejl, jeg kan slette den ...

Because lave en fejl is the normal everyday Danish expression for make a mistake.

Even though English uses make, Danish uses lave here. This is a set expression, so it is best learned as a chunk:

• lave en fejl = make a mistake

You may also see:

• begå en fejl = a bit more formal or serious

Many learners want to say gøre en fejl because of English influence, but that is usually not the standard choice.

En fejl means a mistake / one mistake. The sentence is talking about a single mistake that can later be referred to as den.

Compare:

• lave en fejl = make a mistake, one mistake
• lave fejl = make mistakes, in general

Because the next part says slette den (delete it), the singular form en fejl fits very naturally here.

Den refers back to en fejl.

Since fejl is a common-gender noun (en fejl), the matching pronoun is den:

• en fejl → den

If the noun were neuter (et-word), the pronoun would usually be det instead.

So:

• Jeg laver en fejl. Jeg sletter den.

works because fejl is an en-word.

Yes. Slette means delete.

In a computer context, this makes sense if you have typed something wrong and remove it with a keyboard shortcut. So:

• slette den = delete it

If you wanted to say correct it rather than delete it, Danish would usually use rette den.

Because genvej is a common-gender noun:

• en genvej

For a singular common-gender noun in the indefinite form, the adjective usually has no -t ending:

• en enkel genvej

If the noun were neuter, you would use -t:

• et enkelt klik

So the form of enkel agrees with genvej.

Literally, genvej means shortcut.

In this sentence it means a shortcut on the keyboard, so in English we would usually say keyboard shortcut.

A very common Danish word for that idea is also:

• tastaturgenvej = keyboard shortcut

So genvej here is understandable as the computer-related kind of shortcut, not a physical shortcut in the road.

På tastaturet means on the keyboard.

The idea is that the shortcut exists on the keyboard as a key combination. That is why på is natural here.

Compare:

• på tastaturet = on the keyboard
• med tastaturet = with the keyboard, using the keyboard as a tool

Both can make sense in different contexts, but here på tastaturet fits the idea of a keyboard shortcut better.

Because tastatur is a neuter noun:

• et tastatur = a keyboard

The definite singular form of many neuter nouns ends in -et:

• et tastatur → tastaturet

So:

• på tastaturet = on the keyboard

Yes. Danish often uses the present tense in if-clauses for general situations or future possibilities.

So:

• Hvis jeg laver en fejl
  literally uses present tense, but it can refer to a future possibility or a general situation.

This works much like English:

• If I make a mistake, I can delete it ...

It does not need a special future form.

Yes. The comma separates the initial subordinate clause from the main clause:

• Hvis jeg laver en fejl, kan jeg slette den ...

That is standard Danish punctuation in a sentence like this.