Hello,
No, cannot EDIT or CREATE any styles, but there are a lot of styles from other keyboards that you can load into the "flash" area and also save to a "program" area. I'd bet that you could find some that you are looking for. I have an EXR7s and really like it.
zuki
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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO