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When a map with a transparency value set for an imagery basemap is exported, gridlines are displayed in the image at resolutions above 200 DPI for PDF.

Last Published: October 1, 2022 ArcGIS Pro
Bug ID Number BUG-000095765
SubmittedApril 14, 2016
Last ModifiedSeptember 14, 2023
Applies toArcGIS Pro
Version found1.2
Operating SystemN/A
Operating System VersionN/A
StatusWill Not Be Addressed


When applying transparency to a raster image and exporting the layout in ArcGIS Pro to PDF, grid lines display on the image.


ArcGIS Pro natively supports transparency in any layer, and because of this display, artifacts may be encountered in a PDF reader when an output raster layer contains transparency in multiple tiles.

It is important to note that some layers become raster layers when symbology is applied, such as the heatmap renderer for points, although they are not raster layers in an ArcGIS Pro map. Even a single raster layer can become multiple tiles of a raster layer, that is, placed like mosaic tiles to form the larger image. Raster layers are output in multiple tiles to export higher resolutions without consuming excess resources.

This issue is not reproducible in ArcMap because the output pipeline in ArcMap does not support alpha transparency.


There are three workarounds to make the grid lines invisible:

  • Open the raster in ArcMap, create a map layout, add the raster to the layout, and export the layout as PDF.
  • Export using one of the image format options available in ArcGIS Pro: PNG, JPEG, TIFF, GIF, EMF, etc. The issue is resolved because this action flattens the transparency.
  • Uncheck the Enhance Thin Lines option in Adobe Acrobat or Adobe Acrobat Reader. This can be done by navigating to the Edit tab and selecting Preferences. On the Page Display tab, in the Rendering group, uncheck Enhance Thin Lines.
For this specific problem, Adobe support was contacted and a bug is open in the Adobe Acrobat queue.

Steps to Reproduce

Bug ID: BUG-000095765


  • ArcGIS Pro

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