Method: Delete the copy of the current TCPDF object used for undo operation.

Method: This method allows to undo the latest transaction by returning the latest saved TCPDF object with startTransaction().

Method: Set multiple columns of the same size

Method: Remove columns and reset page margins.

Method: Set columns array.

Method: Set position at a given column

Method: Return the current column number

Method: Return the current number of columns.

Method: Set Text rendering mode.

Method: Set parameters for drop shadow effect for text.