Line thickness in layout & export

[Göran]

I have noticed often that in layoutview and exports from layoutview ArcGIS (currently ArcGIS Pro but problem occured in ArcMap aswell) seems to have problem with thin lines. Is there a solution to this?

My heightcurves have been set to line thickness of 0,14 and 0,4 respectively but in the output they all seem to be set to 1 pt thickness.

Dataview:

Layoutview:

[DanPatterson]

hmmm this reminds me of 

Visual differences in imported map documents—ArcGIS Pro | Documentation

in the Design lines for a specific resolution (dpi)  section

[Göran]

Hmm. Yeah this could be related. Though my map ain't a import from ArcMap its rather the differences in different views within ArcGIS Pro.

[Robert_LeClair]

There is a bug report about this but the user saw it with polygon outlines.  Seems related to this question though - BUG-000124915 : The polygon outline width of less than 1 pt is increased to 1 pt thickness in an exported PDF file when using the 'Export Map to File' function on the Share tab in the ArcGIS Pro ribbon.

[Göran]

If I read that bugreport correctly it only identified a different in the exported PDF while the difference I experience happen already within ArcGIS Pro (and persists into the exported PDF).

In ArcMap I have experienced exported lines to be thicker and when opened in Adobe Illustrator I can see that they have a lower thickness value when I select the induvidual lines but they where anyhow presented as 1 pt thickness. In that map selecting the lines in question in Adobe Illustrater and 'change' them to the same line thickness as they reported as succesfully changed their thickness.

[Anonymous User]

I had a very similar problem and am using ArcGIS Pro. The only solution that worked for me was printing the layout instead of exporting it. When I printed it, the line thickness remained as I set it up on the map and I was still able to get a PDF as the end product.

[AJD1988]

Hi, new ArcGIS Pro user here. The solution I've found to this problem is to select the option "Output as image" in the export pane. Line thicknesses are maintained using this option. Not an ideal solution, but it works. Now, if they could just fix the legend issue (i.e. have the ability to add/remove symbols manually)...

[JocelynTutak]

Thanks for sharing this fix! This problem has been plaguing me on a few projects, and this solved the issue. 

[AlexVerville]

I have this same issue, huge pain for contours. What is happening is the PDF viewer is enhancing thin lines since sometimes thin lines can just appear blank. I don't have the Pro version, but in Adobe Acrobat Reader you can go to Edit > Preferences > Page Display > Enhance Thin Lines and turn that off to fix this. I use Foxit PhantomPDF though and can't find a setting. Like someone else said, if you don't need the PDF functionality to edit text and stuff, you can just export as an image to avoid all of this. 

The thing I can't figure out is why this happens with my maps, but not my colleague's. There must be something on ArcGIS Pro's side that is triggering the PDF viewers to do this.