Iambic B: like most radios. Hold a paddle to repeat it, squeeze both to alternate. A quick press of the other paddle is remembered. Let go of a squeeze and one more opposite mark is added. Iambic A: hold a paddle to repeat it, squeeze both to alternate. A quick press of the other paddle is remembered. Let go of a squeeze and it stops after the current mark. Tap: every tap is kept and sent in order, however fast you tap. Easiest on a touchscreen. One hand: slide a finger between Dit and Dah without lifting it. Pause to finish a letter. Keyboard: ← or Z for dit, → or X for dah.
Short press for dit, long press for dah. Pause to finish a letter. Keyboard: hold Space.