The logging tool tracks all activity in a REDCap project. You can use the logging tool to troubleshoot issues that arise that may be due to a change in a data value, calculations and branching logic no longer working, etc. In the log, you can filter by record, user, data access group, time range, and event type. You can access the logging tool by clicking "Logging" on your left sidebar within a project, underneath the "Applications" heading.