Do you see this?
When you want to see this?
As part of our Autodesk University 2006 presentation on "What DWF Can Do For You?" Brian Mathews noted that the solution is to plot with thinner pens. In fact, to be sure that users can see all the available detail in the DWF file, you can use zero weight pens which are infinitely thin so that as you zoom in on them they never get thicker allowing you to see all the detail present. While mathematically the lines are zero-weight, AutoCAD is smart enough to make them visible by showing them as 1-pixel wide on screen. When printed, almost all printer drivers automatically thicken lines to a minimum weight. These lines will be thickened from the DWF Viewer the same way they are when plotted from AutoCAD model space.
You define pen settings (including weights) in AutoCAD via Plot Style Tables which are stored in “.CTB” files. You can see a list of CTB files in the Plot Style Manager. The CTB files are in turn consumed by Page Setups which are stored in “.PC3” files. You can see a list of PC3 files in the AutoCAD Page Setup Manager. The page setup PC3 files are in turn consumed by several other commands including PLOT, PUBLISH, and the Sheet Set Manager.