Free Text Column Demo
Free Text columns are similar to calculated columns in that they are not part of the Grid's datasource but are created by you and stored with your state.
The difference is that a Free Text column is editable (not derived) and is designed for you to store whatever values you want for each row (typically comments).
This example we created a Free Text Column named 'Comments'. And we added 3 initial comments - which are then automatically saved with the user's state and reloaded with the grid.