The Text branch under Configuration - Ignore Options has the following options:
Ignore blank lines
This option forces the compare to ignore lines containing only line terminators when comparing the active files
Ignore case
This option forces the compare to ignore case when identifying differences in the active files
Ignore whitespace
This option forces the compare to ignore tabs and spaces when identifying differences in the active files
Ignore line terminators
This option forces the compare to ignore line terminator differences (DOS/UNIX/MAC) in the active files
Ignore lines which
This section may be used to define ignore rules based on strings at the beginning or end of lines or to ignore lines containing a specified string.
Ignore a defined number of lines
This section allows the user to define a number of lines at the beginning or end of a file to be ignored for compare purposes.
Ignore lines between
This option may be used to specify the initial word on each line for lines which should be ignored when comparing text files.