Taco HTML Edit Help > Previewing SHTML
Taco HTML Edit will pre-process the Server Side Includes include directive in SHTML documents. The include directive should appear in documents with an SHTML file extension (like ".shtml"), and looks like this:

<!--#include virtual="includedfile.html" -->

Taco HTML Edit will replace the directive with the contents of the specified file when previewing or live previewing; in the above example, the contents of includedfile.html would be inserted where that directive appears. Instead of the virtual attribute in the example, the file attribute also may be used in the include directive. Taco HTML Edit does not support pre-processing any SSI directives other than the include directive. Other directives are ignored during preview.