Printing Problems

How to Remove Lines When Exporting PowerPoint Slides to PDF

John Wilson Oct 9, 2026 871 views

Question details

The user needs to remove unexpected faint dark lines or borders that appear on slides when exporting a presentation to a PDF document.

How to Remove Lines When Exporting PowerPoint Slides to PDF

Product: Microsoft PowerPoint
Device & OS: not provided
Scenario: Exporting a client presentation to PDF where clean visual fidelity without rendering artifacts is required.
Observed behavior: Unwanted faint lines appear around text, shapes, or between elements in the final exported PDF, despite not being visible or intended in the standard PowerPoint slide view.

Before you start

Confirm whether the lines appear in the PowerPoint presentation itself or only in the exported PDF, as standard workspace gridlines and drawing guides do not print or export.

Solution 1Recommended

Remove Borders from Shapes, Tables, and Charts

Unexpected lines in PDFs are frequently caused by transparent or light-colored borders left active on tables, shapes, placeholders, and charts.

Even if outlines appear invisible in the presentation workspace, the PDF rendering engine might display them as thin, faint lines.

Select the specific objects

Click on the shapes, text boxes, or charts where the unexpected lines appear in the PDF.

Remove Shape Outlines

Go to the 'Shape Format' tab on the ribbon, click 'Shape Outline', and select 'No Outline'.

Check Table Borders

If the object is a table, click on it, go to 'Table Design', select 'Borders', and choose 'No Border' to clear all unintended lines.

Remove Borders from Shapes, Tables, and Charts

Test with a Single Slide: Export just the modified slide to PDF first to quickly check if the issue is resolved before exporting the entire presentation.

Solution 2

Merge Overlapping Transparent Shapes

Slight overlaps between light-colored or transparent rectangles can create rendering artifacts or seam lines during the PDF conversion.

Solution 3

Replace Imported Graphics with Native Shapes

Objects imported from other software like Adobe InDesign may not translate perfectly into PowerPoint, causing bounding box lines upon PDF export.

Create and Export Flawless PDFs with WPS Presentation

WPS Office provides a robust, free presentation editor that seamlessly handles shapes, transparent elements, and complex formatting, ensuring your presentation exports to a pristine PDF without unwanted artifact lines or rendering errors.

1. Open your presentation: Launch WPS Presentation and open your .pptx file.
2. Format elements easily: Select overlapping shapes or tables and use the intuitive toolbar to remove unintended outlines or merge objects.
3. Export flawlessly: Click 'Menu', select 'Export to PDF', and enjoy a clean, professional document free of artifact lines.

Perfectly compatible with Microsoft PowerPoint (.ppt, .pptx) filesBuilt-in high-quality PDF exporter that eliminates artifact seamsAdvanced shape merging and formatting toolsLightweight, user-friendly, and completely free to download

microsoft office alternative - wps office

Frequently Asked Questions

Why do gridlines show on my PowerPoint screen but not in the final PDF?

Gridlines and drawing guides are purely visual workspace aids designed to help you align objects perfectly. Because they are not part of the actual presentation design, PowerPoint automatically excludes them when printing or exporting to PDF.

Can using a different PDF exporter fix the faint line issue?

Yes. Sometimes the built-in 'Save as PDF' function creates rendering artifacts known as stitching lines. Using the 'Export' feature, or printing to a third-party PDF virtual printer (like Microsoft Print to PDF or Adobe PDF) can often bypass these rendering errors.

Why do transparent shapes create lines in exported PDFs?

When PDF rendering engines process overlapping shapes with transparency (a process called 'flattening'), they divide the overlapping areas into smaller, opaque pieces. The microscopic gaps between these pieces can display as faint visible seams or lines on certain PDF viewers.

Document & File Issues