Add — Click this button to add a new rule.
Remove — Click this button to remove the current rule.
Move Up — Click this button to move the current rule upward.
Move down — Click this button to move the current rule downward.
[Top-right text box] — Enter the regular expression for the current rule. Use the Modify button to enter the edit mode. The expression must be a valid regular expression. You can check the syntax (and the effect of the rule) as it automatically tests it against the test data in the text box below and shows the result in the bottom-right text box.
Modify — Click this button to edit the expression of the current rule. This button is labeled Accept when you are in edit mode.
Accept — Click this button to save any changes you have made to the expression and leave the edit mode. This button is labeled Modify when you are not in edit mode.
Discard — Click this button to leave the edit mode and revert the current rule to the expression it had before you started the edit mode.
Patterns — Click this button to display some help on regular expression patterns.
Test using all rules — Set this option to test all the rules at the same time. The syntax of the current rule is automatically checked. See the effect it has on the sample text. The result of the test are displayed in the bottom right result box. The parts of the text that are matches of the expressions are displayed in <> brackets. If the Test using all rules option is set, the test takes all rules of the set in account, if it is not set only the current rule is tested.
[Middle-right text box] — Optional test data to test the regular expression for the current rule or all rules depending on the Test using all rules option.
[Bottom-right text box] — Shows the result of the regular expression applied to the test data.