The dialog appears when you select a tabular cell and click Menu > Format > Split. It helps you to specify the number of rows and columns that the specified tabular cell will be split into.
Split Cell Into
Specifies the number of rows and columns to split the selected tabular cell into.
OK
Closes this dialog and splits the tabular cell.
Cancel
Cancels to split the cell and closes this dialog.
Displays the help document about this feature.
Ignores the setting and closes this dialog.