There is another way too. You can create a registration bank with up to 8 Voice settings for R1, R2, and R3.
1. Select a style
from a USB stick (
important) for the registrations, now select your desired OTS and save reg #1. Do this for all 8 reg buttons.
2. now... DELETE the style from the USB drive you saved in each registration button.
3. SAVE the registration bank with a name that makes sense to you.
The result will be you can now select any style and use the OTS in each of the 8 Registration buttons on-the-fly. The current style you have loaded
will not change because... the registration(s) will not be able to find the style saved when you created the registrations (because you delete it)
Works like a charm