How to get here: In Settings on the General Settings tab, select [General Settings] > Documentation > Topic Processing > Multi Topics.

If you describe a symbol at multiple locations Doc-O-Matic concatenates documentation parts. Parts listed at the top of the list appear first in the output.

DTX file (.dtx file) A file that Doc-O-Matic uses to store comments and topic text. DTX files are also called Topic Files. 

interpreted file A file that Doc-O-Matic interprets as DTX file when you add the file to your project. For example, generic source files are interpreted files. Plain text and .html files are interpreted files if you do not convert them into .dtx files.