On the main menu select Display and then Display Extra Column.
There are 2 Extra Columns that can be used in TSM. At Default these are called 'Spare 1' and 'Spare 2'.
Once turned on Spare 1 and Spare 2 columns are displayed.
These columns can be left empty and are entirely optional. It is suggested they are used to store other relevant data such as venue/track/course, date, race grade etc.
You can filter your data on the Spare 1 and Spare 2 Columns - Filter Your Data
You can also rename the Spare 1 and Spare 2 Columns - Edit Column Names