iRIg Keys how to transpose half step in Studio One?

[ak1]

I can seem to only be able to do a full octave transpose via the Octave Up/Down keys under edit, I see a label Transp on the G#4 but don't know how to access the transpose option.
Thanks!

[DarkStar]

>>> iRig Keys User Manual, page 16.

[ak1]

Thanks!
Found it in page 10 (I think), but actually not sure what model keyboard I have.

[mod redacted - IK hardware manuals can be found on their respective product pages via the "Manuals" link in the subnavigation. Do not trust third-party non-IK downloads of our materials]