For regex information see the manual:
Some information about the regex tool:
- Click on - and + to hide and display that box. Hiding settings are stored in a cookie.
- To highlight the match in the subject, click on the number in the "P" column.
- Highlighting does not work, if positions are not available or full subject is disabled.
- Use the letters on top right corner for quick navigation
- See regex tool manual for full help