i sajini bogoseo-e deureogamyeon deo joha boyeoyo.

이/가 is the subject marker. Here, 이 사진이 means this photo as the thing being talked about—the thing that will look better if it is included.

So the structure is roughly:

• 이 사진이 = this photo + subject marker
• 보고서에 들어가면 = if it goes into / is included in the report
• 더 좋아 보여요 = looks better

A learner might expect 은/는, but 이/가 is very natural here because the speaker is focusing on this photo as the item that produces the better result.

보고서에 means in the report or into the report.

The particle 에 is used here because 들어가다 often works with a place/container/destination marked by 에:

• 방에 들어가다 = go into a room
• 상자에 들어가다 = go into a box
• 보고서에 들어가다 = go into a report

In this sentence, 들어가다 is being used in the sense of be included / be inserted. So 보고서에 들어가면 means if it is included in the report.

Yes, 들어가다 literally means to go in / enter, but Korean uses it very naturally for things being included in something.

So for documents, media, lists, schedules, etc., 들어가다 can mean:

• be included
• be inserted
• appear in
• go into

Examples:

• 이 내용이 계약서에 들어가요. = This content goes into the contract.
• 사진이 기사에 들어갔어요. = The photo was included in the article.

So here, 이 사진이 보고서에 들어가면 means if this photo is included in the report.

-면 means if or when, depending on context. In this sentence, it is best understood as if:

• 들어가다 = to go in / be included
• 들어가면 = if it goes in / if it is included

So the first part of the sentence sets up a condition:

• 이 사진이 보고서에 들어가면 = If this photo is included in the report

Very literally, the sentence structure is:

If this photo goes into the report, it looks better.

In natural English, that often becomes:

The report will look better if this photo is included.

좋아 보여요 means looks good or appears good, while 좋아요 means is good.

That is an important difference:

• 좋아요 = it is good
• 좋아 보여요 = it looks good / seems good

In this sentence, the speaker is making a judgment based on appearance or impression, not stating an absolute fact. So 더 좋아 보여요 means:

• looks better
• seems better
• gives a better impression

This is very natural when talking about design, layout, photos, presentation slides, documents, etc.

It comes from 좋다 + 보이다.

The pattern is:

• adjective stem + 아/어 보이다

So:

• 좋다 → 좋아 보이다 = to look good
• 예쁘다 → 예뻐 보이다 = to look pretty
• 맛있다 → 맛있어 보이다 = to look delicious

Then in polite present tense:

• 좋아 보여요

So 더 좋아 보여요 = looks better.

Even though 보이다 is related to to be seen / to appear, this whole pattern is best learned as a common expression meaning to look + adjective.

더 means more, so here it means better in the sense of more good-looking / more favorable in appearance.

Compare:

• 좋아 보여요 = looks good
• 더 좋아 보여요 = looks better

The comparison is usually understood from context. For example, it may mean:

• better than without the photo
• better than another version
• better than before

Korean often leaves the comparison target unstated when it is obvious.

Grammatically, 이 사진이 is the subject of the condition clause, but in natural interpretation, the overall result—especially the report—is what seems better.

So a natural English translation is often:

• The report will look better if this photo is included.

Korean does not always state every implied noun explicitly. The sentence literally says something like:

• If this photo goes into the report, it looks better.

The thing that looks better is understood from context, usually the report, the layout, or the presentation as a whole.

Korean often uses the present polite form to talk about future results when the context already makes the time clear.

So:

• 들어가면 더 좋아 보여요

can naturally mean:

• If it goes in, it looks better
• If we include it, it will look better

English often prefers will in this kind of sentence, but Korean does not need a separate future form here. The conditional -면 already makes it clear that this is a result that happens under that condition.

Yes, but the tone changes.

• 좋아 보여요 = polite, conversational, natural in everyday speech
• 좋아 보입니다 = more formal, more suited to business or presentations

So in a workplace discussion about a report, both can work:

• 이 사진이 보고서에 들어가면 더 좋아 보여요. = polite and natural
• 이 사진이 보고서에 들어가면 더 좋아 보입니다. = more formal/professional

Both mean essentially the same thing.