Clears the undo/redo stack.

Redo changes, cancelling the last undo operation.

Save the current report state into the undo stack.

Undo changes and restore the report to the last saved state.

Returns true if the redo stack is not empty.

Returns true if the undo stack is not empty.

Gets or sets whether the designer should save the state of the report before applying any changes (e.g., when the user moves a field with the mouse).