The Log and Trace tabs (which can be expanded at the bottom of the Project window) provide feedback during the execution of a simulation model. Both the application and individual blocks can post model execution state, event, and error information to these tabs while the model is running. The Log tab contains messages regarding potential configuration and execution state anomalies, warnings, and so on. The Trace tab (if the Tracer is enabled) usually displays simulation clock timestamps and state information for individual blocks as execution progresses. You can customize the content of the Trace tab to filter out unwanted trace messages.