Когда курсор снова появился, я смогла выделить адрес и скопировать его.

Когда means when and introduces a time clause: Когда курсор снова появился = When the cursor appeared again.

It does not govern a noun case here, because it is being used as a conjunction, not as a preposition. It simply connects the subordinate clause to the main clause.

So the sentence structure is:

• Когда курсор снова появился = subordinate time clause
• я смогла выделить адрес и скопировать его = main clause

Russian normally uses a comma to separate a subordinate clause from the main clause.

So in:

• Когда курсор снова появился, я смогла...

the comma marks the end of the when clause.

This is standard Russian punctuation, even where English might sometimes feel more flexible.

Появился is the past tense of появиться (to appear, to show up).

It is formed from:

• появиться → masculine singular past = появился

Why masculine? Because the subject is курсор, which is a masculine noun.

Past tense in Russian agrees with the subject in gender and number:

• masculine: появился
• feminine: появилась
• neuter: появилось
• plural: появились

So курсор появился = the cursor appeared.

Because the speaker is female.

Russian past tense forms agree with the gender of the subject:

• male speaker: я смог
• female speaker: я смогла

So я смогла tells us that the speaker is a woman.

This is a very common feature of Russian past tense.

Смогла is the past tense of смочь, meaning to be able to, to manage to, or to succeed in.

So:

• я смогла выделить адрес и скопировать его

means something like:

• I was able to highlight/select the address and copy it
• I managed to highlight/select the address and copy it

Using смогла adds the idea that this became possible only after the cursor reappeared. It is not just describing the actions; it emphasizes successful ability.

Because after смочь (to be able to), Russian normally uses an infinitive.

Pattern:

• смочь + infinitive

Examples:

• я смогла сделать = I was able to do
• он смог прийти = he managed to come

So here:

• смогла выделить
• и скопировать

Both infinitives depend on смогла.

They are perfective because the sentence refers to completed, successful actions:

• выделить = to select/highlight completely
• скопировать = to copy completely

This fits the meaning well: once the cursor reappeared, the speaker managed to complete both actions.

If imperfective verbs were used instead, the focus would be more on process or repeated action, which would sound less natural here.

Адрес is the direct object of выделить, so it is in the accusative case.

For many masculine inanimate nouns, the accusative singular looks exactly like the nominative singular.

So:

• nominative: адрес
• accusative: адрес

That is why the form does not visibly change.

Compare with a feminine noun, where the accusative often looks different:

• ссылка → выделить ссылку

Его means it here and refers back to адрес.

After скопировать, we need a direct object in the accusative. For masculine inanimate nouns, the pronoun его is used:

• скопировать адрес
• скопировать его

So его = it, specifically the address.

Note that Russian often uses such pronouns a bit differently from English. In English, you might sometimes omit it in certain contexts, but in Russian it is very natural to include его here.

Yes, that would also be possible:

• я смогла выделить и скопировать адрес

This means roughly the same thing.

The version in your sentence:

• выделить адрес и скопировать его

repeats the object with a pronoun. This can make the sequence of actions slightly clearer, especially because the address is first selected and then copied.

So both are possible, but the given version is very natural.

Снова means again.

In Russian, word order is flexible, but this placement is very natural:

• Когда курсор снова появился...

It keeps the focus on курсор as the subject, then adds снова before the verb.

Other orders are possible in some contexts, for example:

• Когда снова появился курсор...

But that can shift emphasis slightly. The original version is a neutral, smooth way to say it.

Появился comes from the perfective verb появиться.

That matters because the sentence refers to a completed event:

• the cursor reappeared
• then the speaker was able to act

Perfective verbs are commonly used for single completed events in the past.

If you used the imperfective появлялся, it would usually suggest repeated appearance, process, or background description, which does not fit as well here.

Yes. Выделить has a broad meaning: to single out, to mark, to выделить in the sense of selecting something.

In computer contexts, it often means:

• to select
• to highlight

So in this sentence, выделить адрес is most naturally understood as selecting or highlighting the address on a screen.

Russian word order is relatively flexible, but not completely free. The original sentence is neutral and natural:

• Когда курсор снова появился, я смогла выделить адрес и скопировать его.

Some rearrangements are possible, for example:

• Когда курсор снова появился, я смогла скопировать адрес, предварительно выделив его.
• Я смогла выделить адрес и скопировать его, когда курсор снова появился.

But these versions may change emphasis or style.

The original order is the most straightforward for everyday narration:

1. first the cursor reappeared
2. then the speaker could perform the actions

A male speaker would say:

• Когда курсор снова появился, я смог выделить адрес и скопировать его.

The only change is:

• смогла → смог

because past tense agrees with the gender of the speaker when the subject is я.

The sentence follows this pattern:

• Когда + past action, я смогла + infinitive + object + и + infinitive + pronoun

More specifically:

• Когда курсор снова появился
  = time clause

• я смогла выделить адрес и скопировать его
  = main clause with смочь + infinitives

So it is a very useful model for Russian:

• Когда X произошло, я смог(ла) сделать Y.
• When X happened, I was able to do Y.

For example:

• Когда интернет заработал, я смог отправить письмо.
• When the internet started working, I was able to send the email.