If you edit a report at the system-level, your changes will apply to all versions of that report in use across the Web TimeSheet system. To edit reports at the system-level, users must have Add Public Reports permission. That is, you must have access to the 'Add Report' link.
To edit a report at the system-level:
If you do not have access to the 'Add Report' link and you carry out this procedure, only your local version of your report will be affected.