Text Compare Settings:  Replacements 

Session > Session Settings >  Replacements

Replacements identify repetitive changes that should be considered unimportant.  You can specify the text to match on one side and the text that replaces it on the other side.

To define a replacement rule:

On the Replacements tab, click New.  Specify the Text to find and the Replace with text.

Match character case

Match only text with the same uppercase and lowercase characters.

Whole words only

Match on the whole words but not parts of words.

Regular expression

Indicates the search string is a PCRE regular expression.  You can use the dropdown button to the right of the search string to insert common regular expression elements.  Click the RE Examples button for more info.

Side

Specifies which editor pane to search.