Editing a matrix' dimensions

[pwarmuth]

Is there a better way to add rows/columns in the matrix editor than tediously inputting them one at a time via MORE -> INSERT -> ROW/COLUMN ? A hotkey? Perhaps a way to directly define the matrix' and/or vector's dimensions? On this same line of thinking, I know the comma key will traverse along a row withinin the matrix template (on the home or CAS screen), but is there a carriage return hotkey hidden away somewhere?