Argument: None
Key sequence:
Alt+Ctrl+T
Transposes the forms immediately preceding and following the current point. A zero prefix argument causes the forms at the current point and the current mark to be transposed. A positive prefix argument causes the form at or preceding the current point to be transposed with the form the relevant number of forms forward. A negative prefix argument causes the form at or preceding the current point to be transposed with the form the relevant number of forms backward.