Menu option: Options > Preferences > Text fields

Text Fields are fields that dtSearch can extract from documents based on markers in the text. For example, you could create a "Subject" field that contains everything from the word "Subject:" to the end of the line. A field definition will apply to documents indexed after you have defined the field.
To create a new field, click New... and enter the name of the field.
Display field in search
results
If you check this box, the field will appear as a column in search results.
Beginning of Field
Text that identifies the start of this field. The text can be
any combination of letters or symbols.
End of Field
Text that identifies the end of this field. To indicate that
a field ends at the end of the line, enter $$$ here.
How to check for field
boundaries in text
There are three ways dtSearch can check for the field boundaries you specify:
Ignore case ("Example"
would match "EXAMPLE", "example", etc.), Require
exact match, and Match
regular expressions.
Where to look for this
field
You can tell dtSearch to only check for a field in a certain number of
lines of each file, and you can enter filename filters to disable scanning
for a field except in files matching the filters.