ArcGIS Desktop software is a great place to begin making a map, but often I find that there are additional types of graphic map styling. Fortunately ArcGIS makes this process pretty easy, but there are a few tips and tricks which will help make the exported AI file an easier document to work with. One of the primary reasons for exporting ArcGIS Maps to adobe illustrator is because you apply additional styles to vector artwork, such as blured lines, and for laying out type on curved paths. If your map includes raster data, you will want to export that data as individual TIFF files, and not have them turned on during the AI Export. If you do not do this, the raster layers will export and be included in the AI file, but it will be divided into multiple striped images, and not a single layer. Transparency: Transparent vector layers are converted to raster data, and are not exported as editable vector features. As such, if you want your final map to include transparent features, you will want to apply these style setting in Illustrator after the export. Dashed lines: A broken line (any combination of dashes or dots) exports each individual dash or dot as a single line object, not as a single line wiht a continuous style applied to it. Like transparency, this style effect is best applied in Adobe Illustrator. While the MapLex Labeling Engine does a great job of placing text, several different type settings limit the editability of the type after it has been exported, thus I choose to avoid using them. Here are my suggestions for the Export settings for an AI File. On the General Tab: 1. set the Resolution to ‘300’ dpi 2. set the Output Image Quality to ‘Best’ 3. check the option-box for ‘Clip Output Graphics Extent’ On the format tab: 1. set the Destination Colorspace to ‘CMYK’ 2. set the Picture Symbol to ‘Vectorize layers with bitmap markers/fills’ 3. uncheck ‘Convert Marker Symbols to Polygons.’ The result that is produced when ArcGIS generalizes the shapes of these marker symbols is inconsistent. Much more desirable results are achieved by using the Type ->, Create Outlines operations. Source.