To locate specific text in a text or data comparison, select Find 
from the Search menu.
Text to find
Enter the text to search for.
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.
Wrap search
When one end of the file is reached, continue searching at the other end.
Search up
Searches backwards, towards the top of the comparison.
Sides
Specify the sides of the comparison to search.
Close automatically
Close the dialog immediately after clicking the Find button. Use the Search menu's Find Next and Find Previous commands for finding additional occurrences of the search string.