Over six years ago, we published a table of tools that could be used to convert a PDF file to a DWG file. At the time, this list was composed of programs that you installed locally. Today, we want to tell you about a FREE online service that you might want to consider named ConvertPDFToAutoCAD.com - there is nothing to purchase or download, you simply upload the file to the service and provide an email address. When the file conversion is complete, you will receive an email containing a link to your file.
If you want a date field that always updates (or at least as often as defined by the system variable FIELDEVAL), use a DIESEL expression. (DIESEL stands for Direct Interpretively Evaluated String Expression Language).
Here is an example that will give you the full month, spelled out and the four digit year, in uppercase.
Many people are aware of the AutoCAD drawing (v 2.18) of the solar system, circa 1985. The name of the file is solar.dwg and it was included as a sample drawing at one point. You can download the drawing from this Between the Lines post from a couple of years ago.
Why am I bringing this up again now? I just thought is was pretty awesome that you can view this drawing using AutoCAD 360, on a smartphone. At one extreme, you can view the entire solar system including the almost 6 BILLION km orbit of Pluto. At the other extreme, you can zoom all the way down to the ±1/3 inch writing on the plaque on the lunar lander sitting on the moon. See screenshots below. (Note: I changed the colors of the linework to green in the screenshots for visual clarity)
If you have an AutoCAD shape file (.SHX) and you want to make changes to it, you will need the source file (.SHP) from which is was created. If you do not have the source file, there is a way to convert the .SHX to .SHP if you have Express Tools installed with your copy of AutoCAD. Read more about Converting AutoCAD SHX to SHP