I have problems with export as well, I have drawn extra assembling helping guides using traces on the assembly layer but cannot export this to pdf. Why ?

Works for me though :-)   I assume you need to use default color palette to make this work without problems?

@maximumiq, Make sure Top Assembly layer is added to your PCB and enabled in the Export to PDF dialogue box: [](https://uk.farnell.com/aavid-thermalloy/6398bg/heat-sink-to-220-218-4-4-c-w/dp/1213473)<br> <br> and export to separate layers then unzip the download.

@maximumiq, One way round this is to use the 'GerbV' (v2.6A) gerber viewer. _ Create the gerber files from the project. Load the gerber files into the viewer. Uncheck the visibility of everything you do not want to include in the pdf. Use File > Export and select 'PDF...' You need to select a location and type in a filename INCLUDING the 'pdf' extension, oddly it does not get added automatically. _ Before exporting You may want to change the colour of the layer and / or the background for clarity. The layer can be changed by clicking the small colour swatch in the layer itself. The background can be changed using View > Change background color _ Regards.