The Regex Coach - Tutorial step 9

Now un-select your previous selection in the regex pane (although this is actually not necessary) and press the highlight button for the second register group.

Screen Shot

The orange background now emphasizes what would be Perl's $2 variable after this match. The highlight message below the button you've just pressed shows the position of the orange area within the target string - it is two characters long and ranges from position 4 to position 6.

Note that only the first two register highlight buttons are enabled because our regular expression only has two register groups.