Hi Don,
Which version of uBiTx do you have. and are there any modifications from stock?
Most versions with stock displays are as Curt has stated.? You change settings through the encoder (tuning knob) and pressing the knob in to select.
The v6 and those upgraded to KD8CEC software with touch screens do have menus through the touch screen.??
Either way, there is a menu setting used to set straight key or iambic a or b.
73
Evan
AC9TU