A cell whose comment card is asked to stay beside it with the caret in its text: a draft when the cell has no thread, the thread's reply box when it has one.
The column index of the cell.
A new value each time the card's text is asked to take the caret; 0 when the card is only asked to stay.
0
The row index of the cell.
Optional
Optional scope of the container for the ranges.
A cell whose comment card is asked to stay beside it with the caret in its text: a draft when the cell has no thread, the thread's reply box when it has one.