The Log window reports information related to the reading and showing of a dataset, which you can use to confirm that data was read correctly. It shows statistics and processing information whenever you open a dataset.
Data Inspector saves the ten most-recent log files to the location specified at the top of the Log window. By default, this location is C:\Users\<username>\AppData\Local\Temp\FMEDataInspector\logs\. To prevent Data Inspector from removing an old log file from this location, rename the file.
Alternatively, you can copy information directly from the Log window: Place the cursor in the Log window, right-click to display the context menu, and select Save Text; or press Ctrl+S.