The Editorial Freelancers Association defines developmental editors, also described as substantive, structural, or content editors, as professionals concerned with content, organization, and genre considerations. A developmental editor may provide a manuscript evaluation or a detailed editorial letter identifying major issues and recommending ways to address them.

Editors Canada’s Professional Editorial Standards 2024 uses the closely related term structural editing, defining it as assessing and shaping the overall organization and content of a work for its intended audience, medium, and purpose.

The terminology varies across publishing companies and individual editors, but the underlying principle is consistent: developmental work asks whether the manuscript functions effectively as a complete work.

For fiction, that may involve examining:

• plot architecture;
• character development and motivation;
• pacing;
• narrative point of view;
• stakes and conflict;
• chronology;
• world-building;
• chapter sequencing;
• opening and ending effectiveness;
• unresolved subplots; and
• genre expectations.

For memoir and narrative nonfiction, the questions may concern narrative focus, chronology, thematic development, repetition, scene selection, context, and the relationship between personal experience and the larger purpose of the book.

For prescriptive or informational nonfiction, developmental editing often examines the argument, chapter organization, audience, evidence, logical progression, repetition, missing information, and whether the manuscript delivers what its premise promises.

Editors Canada’s structural-editing standards specifically include reorganizing material, improving narrative or expository flow, recommending additions or deletions, addressing repetition and irrelevant material, identifying gaps, and questioning inadequate research or lack of focus.

That is a very different task from correcting commas.

Copyediting Works at a More Detailed Level

Once the content and organization of a manuscript are substantially settled, editorial attention can move closer to the sentence.

Editors Canada defines copyediting as reviewing material for correct and consistent grammar, punctuation, spelling, and usage, while also checking that required content elements are accurate and complete.

The Chartered Institute of Editing and Proofreading similarly places copyediting after developmental and stylistic work in the traditional publishing workflow. Its guidance describes copyediting as checking grammar, spelling, punctuation, consistency, clarity, formatting, cross-references, and other detailed elements once the content has largely been agreed.

A copyeditor may address questions such as:

Why is Chapter One written as words while later chapter numbers use numerals?

Is the character named Catherine, Katherine, or Kathryn?

Should the manuscript use “email” or “e-mail”?

Is Internet capitalized in one chapter and lowercase elsewhere?

Does the timeline still make sense after revisions?

Do quotations have appropriate attribution?

Does a cross-reference direct the reader to the correct chapter?

Are headings, lists, notes, citations, and recurring elements handled consistently?

In fiction, copyediting can include consistency checks involving character names, physical descriptions, dates, locations, fictional terminology, and chronology. CIEP specifically identifies these kinds of checks as part of copyediting practice.

The copyeditor is therefore doing far more than running a spelling checker.

The goal is to remove inconsistencies and language-level obstacles that may distract the reader or undermine confidence in the text.

The Simplest Distinction: Architecture vs. Execution

One useful way to understand the difference is to think of the manuscript as a building.

Developmental editing asks whether the rooms are in the right places.

Does the structure support what the building is meant to do? Is there a staircase where one is needed? Does one section dominate unnecessarily? Is an important component missing? Would changing the floor plan solve a larger problem?

Copyediting assumes that most of those architectural decisions have already been made.

Now the work becomes more detailed. Are the finishes consistent? Are labels correct? Are small defects creating friction? Do all of the individual elements work together cleanly?

The analogy has limits, but it illustrates why editorial order matters.

If a developmental edit leads an author to delete three chapters, combine two characters, rewrite the ending, reorganize half the nonfiction argument, or add 15,000 words, any detailed copyediting performed on the earlier version may have been partly wasted.

That is why professional editorial workflows generally move from large-scale intervention toward increasingly detailed review. Editors Canada’s standards distinguish structural, stylistic, copyediting, and proofreading stages, while recognizing that stages may overlap or be described differently in different projects.
Where Does Line Editing Fit?

The distinction becomes more complicated when line editing enters the conversation.

Line editing commonly occupies the territory between developmental work and traditional copyediting.

The Editorial Freelancers Association describes line editors as working primarily at sentence and paragraph level, with emphasis on improving language and style. Line editing may occur separately, alongside developmental editing, or in conjunction with copyediting.

Editors Canada uses the term stylistic editing for closely related work: clarifying meaning, improving coherence and flow at paragraph and sentence level, and refining language. It notes that line editing is often understood as a combination of stylistic editing and copyediting.

A line editor might focus on:

• repetitive sentence structures;
• overwritten or underdeveloped prose;
• unnecessary exposition;
• awkward transitions;
• unclear phrasing;
• dialogue that sounds unnatural;
• inconsistent narrative voice;
• weak paragraph flow;
• excessive wordiness; and
• language that fails to achieve the intended tone.

This explains why an author requesting “copyediting” may sometimes discover that the manuscript actually requires heavier sentence-level intervention.

Editorial terminology is not completely standardized across every publisher and freelancer. The safest approach is to look beyond the service label and examine the scope of work.

Ask what the editor will actually evaluate and change.

Developmental Editing Does Not Mean Rewriting the Book

Some authors hesitate to pursue developmental editing because they assume the editor will rewrite the manuscript into something unrecognizable.

That should not be the objective of professional developmental work.

A developmental editor identifies problems, explains why those problems affect the reader, and proposes possible solutions. The author may then carry out substantial revisions.

The degree of hands-on intervention depends on the agreement.

For example, an editor might observe that a novel’s central conflict does not become clear until Chapter 7 and recommend restructuring the opening. The editor might identify scenes that could be moved or compressed, but the author remains responsible for deciding how the manuscript should ultimately be rewritten unless rewriting is explicitly included in the service.

In nonfiction, an editor may conclude that Chapters 4 and 5 make substantially the same argument. The recommendation might be to combine them, redistribute supporting material, or sharpen the distinction between the chapters.

The developmental editor diagnoses the manuscript at the level where its largest problems exist.

That can mean asking difficult questions rather than supplying easy corrections.