https://forums.autodesk.com/t5/autocad-forum/plotting-line-weights/m-p/5577396#M333784 It may be a specific MAP object type issue since MAP3D creates content and object types not found in plain AutoCAD.<BR /><BR />If you are simply using 'dumb' lines and Plines, here is what you do:<BR />- use QSELECT or SELECTSIMILAR commands to select all PLINEs in your file. Now Start PROPERTIES command, and instead of "can't see width settings" you actually set them to zero to ensure they are indeed without a width setting.<BR />- Ensure all your objects LINEWEIGHT settings are BYLAYER (there is a pulldown on the Ribbon in the first tab to ensure that is correct).<BR />- Start LAYER command, go to the line weights column, and select something really huge for a setting for all layers. Like 2.00mm.<BR />- Are they all really thick lines on screen in modelspace? If yes, are they in paperspace? If yes then...<BR />- Start PLOT command, make sure the pop-up is fully expanded, ensure NO plot style table is selected in the top right corner (needs to say NONE), shadeplot is set to 'as displayed", and under Plot Options you have PLOT OBJECT LINEWEIGHTS selected but nothing else in that section. Choose the DWG TO PDF.PC3 plotter and create a PDF. Click APPLY the OK to create the PDF.<BR /><BR />The above works fine for me in plain-jane AutoCAD 2011-2012-2013-2014-2015-2016, but I don't have MAP3D or access to it. Thu, 09 Apr 2015 13:13:40 GMT pendean 2015-04-09T13:13:40Z