How to Improve DWG to PDF Line Weights and Keep Text Searchable
Question details
The user needs to convert a DWG file to a PDF with proper line weights while maintaining fully searchable text, as direct import causes weak lines and Distiller breaks searchability.
- Product
- Adobe Acrobat, AutoCAD
- Device & OS
- not provided
- Scenario
- Converting or plotting DWG engineering drawings to PDF format for printing and digital archiving.
- Observed behavior
- Directly importing DWG into Acrobat creates a PDF with searchable text but weak or missing line weights. Using the Acrobat Distiller printer results in good line weights but the text is no longer searchable.
Ensure you have access to the original DWG file in your CAD software, as achieving the best searchable text often requires modifying the fonts within the source document before exporting.
Replace Stick Fonts with Standard Fonts in AutoCAD
The most effective way to ensure both proper line weights and searchable text is to change the fonts in the source DWG file before exporting to PDF.
AutoCAD often uses legacy 'stick' or SHX fonts. Adobe Acrobat interprets these stick-type fonts as having essentially zero-point line weights, causing them to appear faint or disappear entirely upon conversion. Converting them to standard TrueType fonts resolves this.
Launch AutoCAD or your preferred CAD software and open the original drawing file.
Select the text elements or text styles in your drawing that are currently using legacy stick-type (SHX) fonts.
Modify the text style properties to use standard, fully-bodied TrueType fonts such as Arial, Myriad, or Calibri.
Plot or export the drawing to PDF again. The new standard fonts will be rendered with proper thickness and remain completely searchable in Acrobat.
Adjust Line Weights Directly in Adobe Acrobat
Use this method if you cannot edit the original DWG file and need to artificially thicken the weak lines within an already converted PDF.
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Frequently Asked Questions
Why does Adobe Acrobat treat DWG text lines as 0-point weight?
AutoCAD frequently uses legacy stick-type fonts (SHX). Because these fonts consist of single-line vectors rather than outlined shapes, Acrobat interprets them as having zero or nearly zero line weight, making them appear incredibly faint or completely invisible in the final PDF.
Does using Acrobat Distiller fix searchable text issues?
No. While Acrobat Distiller often produces much better line weights when plotting from CAD software, the printing process typically flattens the text into vectors or images. This removes the text metadata, completely eliminating the ability to search for text within the resulting PDF.
What are the best fonts to use in AutoCAD for PDF export?
It is highly recommended to use standard TrueType fonts (TTF) such as Arial, Myriad, or Calibri. These fonts inherently possess thickness and are easily recognized as text objects, ensuring they remain both visible and completely searchable when the DWG is converted to a PDF document.
