TrvActionTableCellRotation90 is the action for "Table | Rotate Cell by 90°" command.
TrvActionTableCellRotation90 = class(TrvActionTableCellRotation)
The action sets the rotation of the selected table cells (or the edited cell) to 90°. It changes table.Cells.Rotation to rvrot90. If the cell was rotated horizontally (0° or 180°), it also exchanges table.Cells.BestWidth and BestHeight.
This action does not introduce any new properties in addition to properties of TrvAction.