Check Image Detail at Its Final Printed Size

Review each important illustration at the size it will occupy in the final printed book. Check the source quality, placed dimensions, export result, and the reader’s visual task together. A technically acceptable image can still fail if its labels, distinctions, or essential details are too small to understand in context.

Identify the information the reader must see

Start with the illustration’s purpose. A decorative image can be assessed differently from a diagram explaining a procedure or a chart supporting a comparison. List the details necessary for the reader to understand the lesson: labels, boundaries, arrows, textures, or small differences between examples. This gives the visual check a task beyond deciding whether the page looks generally attractive.

Choose the most demanding images for an early layout test, then review the rest before publication. Include figures with fine lines, dense labels, or multiple panels. An easy example with one large shape cannot establish that a detailed instructional figure will work under the same sizing rule. The book’s visual system should allow appropriate exceptions when the teaching task requires more space.

Distinguish source size from placed size

Record the image’s available pixel dimensions and the physical dimensions at which it is placed. The relationship matters: enlarging the same source over a larger area changes the detail available per unit of printed space. Consult current KDP submission guidance for the applicable image requirements, and use the actual source and placement when checking them rather than relying on a filename that says “high resolution.”

Inspect the real source quality as well. A large file may contain blurred or previously enlarged content. Increasing its pixel dimensions does not necessarily restore meaningful detail that was absent from the original. Keep the distinction between numerical properties and visible information clear. Both can contribute to the review, but neither should be assumed to prove the other without inspection.

Review the composed page at intended scale

Place the image with its final caption, labels, and surrounding text, then inspect the page at the intended reading size. Ask whether the reader can complete the visual task without enlarging a screen preview. Check the relationship between nearby labels and the objects they describe. Crowding or small type can make an otherwise clear diagram ambiguous when it is reduced to fit the page.

For example, a four-panel demonstration may look readable when viewed alone on a large monitor, yet lose the distinction between two intermediate steps after placement. Consider enlarging it, dividing it into separate figures, or simplifying nonessential detail. Choose the repair that preserves the lesson. Do not remove an important intermediate state merely to retain a uniform image size across every chapter.

Inspect what the export actually preserves

Compare the source placement with the final exported page. Output settings may change how images are represented, and the result must be examined directly. Check fine lines, labels, contrast, and any visible artifacts around high-detail areas. If the export differs from the working view, identify the relevant setting or source issue using the application’s documentation and a controlled test.

Keep a representative test file when investigating a problem so you can compare changes without repeatedly exporting the entire book. Once the issue is resolved, apply the appropriate correction to the editable source and produce a fresh final export. Review other images affected by the same setting. A local improvement to one figure is insufficient if the underlying change reduces quality elsewhere in the manuscript.

Combine technical checks with a reader task

Use available file inspection to assess measurable properties, then ask a reviewer to interpret the important figures in the assembled book. They should be able to identify the intended distinctions and follow the explanation. Record where they hesitate or misread a label. Those observations may reveal a design problem even when the file meets the relevant numerical requirements.

Complete the applicable preview and proof review for the publication, keeping the checked file and settings identifiable. Revisit affected images after changes to page size, margins, layout, or export methods. The final decision should establish that the illustration is both prepared appropriately and usable for its intended purpose. A passing technical report is valuable evidence, but it does not replace checking what a reader can actually see and understand.